![](data:image/jpeg;base64,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)
Рис.2.2, а) До доведення 1 признаку рівності трикутників [8]
Тому що
![](data:image/png;base64,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)
, то вершина
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAXCAYAAAALHW+jAAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAADqSURBVEjHY2hsbGSgJmYYNZA2BkYZMyxkYGD4j4KNoxZS5MIcN9liBgbju7H19ZL19bGSxgwMd4kxFKcE2JVQAzo60ng8ZBj2MMh47Enr6OAh2UCYi4yjG3xQDCTXhQ3Rxj4w7yLCFMEn2UBI+CEiBOZSsiIF5j1Zt5xisPfzPAxlGRjewPgkGwgxQPamR169IWoyItPLYO8ixSa2GIYnI2BwoLsca+wiK4IlcmSxPDe3MFj6NGIw2o3scpwRgcCyb5C9j5leZXuR5SnOu9EeHsnIiZ0iw0DpFT1JUWQYtpxDlmH4Ev4ILLEB5SqdvUhlpH0AAAAASUVORK5CYII=)
збігається з вершиною
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABMAAAAXCAYAAADpwXTaAAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAADNSURBVDjLY2hsbGSgFmYYNYw6hkUZMyxkYGD4j4KNoxaS7bIcN9liBgbju7H19ZL19bGSxgwMdwkZiFMC7Dqo5o6ONB4PGYY9DDIee9I6OnhIMgzmEuPoBh8Uw8hxWUO0sQ/Mi4gwRPBJMgwSXojAh7mQ5AiAeUnWLacY7OU8D0NZBoY3MD5JhkE0y970yKs3RE0qZHgT7EWkWEOPSTgfi+FYYxHZS7AEjCwGMtBdzngWTsPQAx2BZd8ge5kow0jBI8QweKmClldHSEkLAKKofGCACnTsAAAAAElFTkSuQmCC)
(див. рис.2.2, б).
![](data:image/jpeg;base64,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)
Рис.2.2, б) До доведення 1 признаку рівності трикутників [8]
Тому що
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAIkAAAAXCAYAAAA/SGz6AAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAAJ8SURBVGje7VkxUsMwENQD8gAyg/hDoj8IF6kp4slQwFAxbqgzTro0+QAdJW8gL+AHFPlB/gCx4WxZlmRZliUyc8UWiSPd7Xp1Jylku90SBMIEFAGBJkGgSRBoEsRFmuSZ0xeWbhbwecnIGyHkuwG2fBuSVJ4lM8azR5vfNuPTU5Lls03KFmKOMRBCp1Ba9SZO+fOL6ntC2HGV59M8X00ZIUdXAXa7p0lyTQ5diRfkZKFhLAgQ0yBj6xRSq8HEK4f+JVAFv04OT7vdpC9xcLuJOJBW/aYU/+b21SX2mAbxrVNIraySKQNpHA8rApKoyDuskLL0cb6mhH7p3F2UV0rIyZgPS/MYBgmlU2itBhGvnfpbQmt315/79FbKlnt5PnXJjttOYuoUQyurZLrKq7gZc9kwFquKM74uyp6JuI8Srd/IKWC5ykPpFEsrM3GavJsCQCLQg6G86Xqy9cvSEPOx2fONkDrF0sqZeE222RP7llH5CFaOvxCThNQpplZkyOmgLKFCknKJq49ZajFUZRpOALqxJnGhFGeb7MoU10e78alT46We46oqjEmr5pHWbt8jtq2u+C3iczL/sHE3TCpOCKKL3xXJ3N6wV3nOsp9Kq0Auy6qx1Y5dIv+bO/2E1aqL66WCjKBTxvkd3J/Ic9topeJsq1VX/PaFSxfOyd5zulY/b++kW4kLjhWFasU/xykqgupF16tGjN0UYiyTjKVTs0LQffG8j1ZQuWXONlrp4jvduLruxl1fVqyxsZEmyYPLicQXZzk+muSfYcj/Tj44q+KjSS7oQm5szrr4oxOvThAOlzqxxsaAj8u2IZxN8S+qVyPiAEVAoEkQw/EDawABLtc4qqsAAAAASUVORK5CYII=)
то промінь
![](data:image/png;base64,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)
збігається із променем
![](data:image/png;base64,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)
(див. рис.2.2, в).
![](data:image/jpeg;base64,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)
Рис. .2.2, в) До доведення 1 признаку рівності трикутників [8]
Тому що
![](data:image/png;base64,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)
=
![](data:image/png;base64,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)
, то вершина
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABUAAAAXCAYAAADk3wSdAAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAAD0SURBVEjHY2hsbGSgNmYYNZS+hkYZMyxkYGD4D8Gybzzy6g0boo19jKMbfEg2FKQRbJBx1EKYWEdHGo+HDMMemOEkGQozEJtr6utjJY3l3GeldXTwEG1ofZ6HoSwDwxtkF2IYahxdT1KY5rjJFhPjPaINhYeZjMceQt4j2lCw1xgY7uLy+uAxFJEuje/G1tdLoisEBY+bsVstKGjgDgCmElm3nGLiYh/NYJAhRgyyp2ARmOfmFgaSh4gb7UZ3BAM2F0ESOSwngTB210N8J9uLnloozufRHh7J6KmFIgNxlQMUGYgrpZBlICTnIcIc3bUjvOQHADcDxZHD4vM+AAAAAElFTkSuQmCC)
збігається з вершиною
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABMAAAAXCAYAAADpwXTaAAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAADQSURBVDjLY2hsbGSgFmYYNYy6hkUZMyxkYGD4D8Gybzzy6g0boo19jKMbfIg2DKQBbIBx1EKYWEdHGo+HDMMemKFEGQYzCJvt9fWxksZy7rPSOjp4CBpWn+dhKMvA8AbZRRiGGUfXExVmOW6yxfi8QXQEwMNExmMPLm8QbRjYCwwMd3F5ceAMQ6Qr47ux9fWS6ApBweBm7FYLCgJEMkFViz020RSBXG3EIHsKOWJABrrLGc/CaRhq4oSlfBDGdC1RhhGLR4hh8BIFKZGPkJIWAPDbgW/YfTCVAAAAAElFTkSuQmCC)
(рис.2.2, г).
![](data:image/jpeg;base64,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)
Рис.2.2, г) До доведення 1 признаку рівності трикутників [8]
Отже, трикутник
![](data:image/png;base64,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)
збігається із трикутником
![](data:image/png;base64,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)
, виходить, дорівнює трикутнику
![](data:image/png;base64,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)
.
Теорема доведена.
Теорема 2.2 (Друга ознака рівності трикутників по стороні й прилеглим до неї кутам).
Якщо сторона й прилеглі до неї кути одного трикутника рівні відповідно стороні й прилеглим до неї кутам іншого трикутника, то такі трикутники рівні.
Доведення.
Нехай
![](data:image/png;base64,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)
і
![](data:image/png;base64,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)
- два трикутники, у яких
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAANcAAAAXCAYAAACYldoBAAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAALWSURBVHja7Zo7UsMwEIb3ADkAzER0dDREPaVxwQWSDEPDpGLcUGeUdGm4QDpKzgAn4AYUNNTcAXASBz9keWVrpTy2+IuYyPr8e1faFYH5fA4sFsu92AQWi5OLxeLkYrFYnFws1o4kl0riSxkl9/lrIwnPAPBTkBw9+3wIHVdZITgfIvEox7ObruwhuKjZygy7EEeu2dATLhaTXtyHN91LSWEA5OetUqdK3Z5KgE9fxpi4QnKmc4no4dEVu08uarY6hpBxRMGGnjTLXp3Zq79tJspeCvTjt8li0aM2w8QVihMbwDbsPrko2UwMIeOIgg016Wwsb2QUTQWIjzhRl4XSYZPF2UvYTuxhxTFxVUocT5wpE+aeNuw+uSjZTAwh44iKDdXPCDl6Wk2+2RYrULnr6xWv+j2KPsvEpTWPmBMbwLbsPhOLiq2JIVQcUbI11t2RjKbp1ldn9roW/W/0msoIbXNo2ShiuPQ1M56zbbK7ZHfhFZarra+uvAkRR1RsqOSqPECpxsy2x6xOXYECfGPr+q59Vh1XXXNOxbm6n4hfML2BLbsvLio2DEOoOKJmM9fd5ePIktnriYp1OfV2juHSmkjEaRPAbdh9JRYFG5YhRBz5YENvlfnTksJ2mXsBmFOULtu5iWs7d13pauA0jW08JDm7XmICEOupC69suLr46sob73HkkM3kj755ayj/8ico+WvZA1Ns5xiu9PP1mVzmHxLLqRvbFDwDGLxivo/11MmKbMHVxVdXDL7jiIKtzp/KjbLMzwavG9tiHT6OhdKvGOLb9bGyDVcyS07yD1luRE2c2sTc1NflVakyd53E4P0C4AvD7qI0RHOlXqnheVtfnXjzd9+7SEx9xRElW2NyHYJsV1jsWDWMr3z8L2offT12bzi5Wo4N9ROcffCVveHk8jL2mHcu1pEk1/YEqUUP02XsoYu9aecPm8NiEYlNYLE4uVis/dIv18VUo9kfplIAAAAASUVORK5CYII=)
(рисунок 2.3).
![](data:image/jpeg;base64,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)
Рис.2.3 До доведення 2ї ознаки рівності трикутників [8]
Доведемо, що трикутники рівні. Ð
Нехай
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADQAAAAXCAYAAABEQGxzAAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAAG9SURBVFjD7Zc9csIwEIX3ABwgzCDuALqDUEGdwh6qZKgYNdSM7M4NF6DjHOEEuUEKbsAdkkiKZFn+kZBJyDAuVHgsv91v92kFkOc5PNJ6KJgBaAD670Cc0Rkm7LVrT4LhCACflYWT47WJVXXQhTI+y1K8xGm2vAlQUaxHdAInn6BYG4K2APi84nzM+WqMAc6hUCJptwg6tga7CZCuWAiQ3PuTkElmQk/rohiFwDTFkIWZLg4+DQitGiZkhwB9+CqkO6KTMkCeDgk7I4BL2z6pi1Pe+wzJQDjZq+opG/mrXO5TnfV/p2zqt1QvIFFdgslOtDkUSCVWDoQQi15jy15AtYnlCagTQ2SztW2kn302jZmGwUDuiJRwHiAFUD1nIZb7dSB9bpomVzlC60lKu1nQTVYyyX933O5cF7ht/S6NRiB5VpxOuFYSz4spPtjBdZB6ktWgjJBnfT/NYf6mNcyUc6DUPvRud71NowJkU9tJmIvOOkcsY082kDsI3Bu+/Yyivf2+7L6t0W1XVyPKp00dilkppS99p5qrcTegkN9lMRp3AZI27jnR2jSixMz9FHERxly812gMf/AGoD9eX8y6z2tsa4a9AAAAAElFTkSuQmCC)
- трикутник, дорівнює трикутнику
![](data:image/png;base64,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)
з вершиною
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAXCAYAAAALHW+jAAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAADqSURBVEjHY2hsbGSgJmYYNZA2BkYZMyxkYGD4j4KNoxZS5MIcN9liBgbju7H19ZL19bGSxgwMd4kxFKcE2JVQAzo60ng8ZBj2MMh47Enr6OAh2UCYi4yjG3xQDCTXhQ3Rxj4w7yLCFMEn2UBI+CEiBOZSsiIF5j1Zt5xisPfzPAxlGRjewPgkGwgxQPamR169IWoyItPLYO8ixSa2GIYnI2BwoLsca+wiK4IlcmSxPDe3MFj6NGIw2o3scpwRgcCyb5C9j5leZXuR5SnOu9EeHsnIiZ0iw0DpFT1JUWQYtpxDlmH4Ev4ILLEB5SqdvUhlpH0AAAAASUVORK5CYII=)
на промені
![](data:image/png;base64,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)
й вершиною
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABUAAAAXCAYAAADk3wSdAAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAAD0SURBVEjHY2hsbGSgNmYYNZS+hkYZMyxkYGD4D8Gybzzy6g0boo19jKMbfEg2FKQRbJBx1EKYWEdHGo+HDMMemOEkGQozEJtr6utjJY3l3GeldXTwEG1ofZ6HoSwDwxtkF2IYahxdT1KY5rjJFhPjPaINhYeZjMceQt4j2lCw1xgY7uLy+uAxFJEuje/G1tdLoisEBY+bsVstKGjgDgCmElm3nGLiYh/NYJAhRgyyp2ARmOfmFgaSh4gb7UZ3BAM2F0ESOSwngTB210N8J9uLnloozufRHh7J6KmFIgNxlQMUGYgrpZBlICTnIcIc3bUjvOQHADcDxZHD4vM+AAAAAElFTkSuQmCC)
в тій же напівплощині відносно прямій
![](data:image/png;base64,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)
, де лежить вершина
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABMAAAAXCAYAAADpwXTaAAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAADQSURBVDjLY2hsbGSgFmYYNYy6hkUZMyxkYGD4D8Gybzzy6g0boo19jKMbfIg2DKQBbIBx1EKYWEdHGo+HDMMemKFEGQYzCJvt9fWxksZy7rPSOjp4CBpWn+dhKMvA8AbZRRiGGUfXExVmOW6yxfi8QXQEwMNExmMPLm8QbRjYCwwMd3F5ceAMQ6Qr47ux9fWS6ApBweBm7FYLCgJEMkFViz020RSBXG3EIHsKOWJABrrLGc/CaRhq4oSlfBDGdC1RhhGLR4hh8BIFKZGPkJIWAPDbgW/YfTCVAAAAAElFTkSuQmCC)
.
Тому що
![](data:image/png;base64,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)
, то вершина
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAXCAYAAAALHW+jAAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAADqSURBVEjHY2hsbGSgJmYYNZA2BkYZMyxkYGD4j4KNoxZS5MIcN9liBgbju7H19ZL19bGSxgwMd4kxFKcE2JVQAzo60ng8ZBj2MMh47Enr6OAh2UCYi4yjG3xQDCTXhQ3Rxj4w7yLCFMEn2UBI+CEiBOZSsiIF5j1Zt5xisPfzPAxlGRjewPgkGwgxQPamR169IWoyItPLYO8ixSa2GIYnI2BwoLsca+wiK4IlcmSxPDe3MFj6NGIw2o3scpwRgcCyb5C9j5leZXuR5SnOu9EeHsnIiZ0iw0DpFT1JUWQYtpxDlmH4Ev4ILLEB5SqdvUhlpH0AAAAASUVORK5CYII=)
збігається з вершиною
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABMAAAAXCAYAAADpwXTaAAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAADNSURBVDjLY2hsbGSgFmYYNYw6hkUZMyxkYGD4j4KNoxaS7bIcN9liBgbju7H19ZL19bGSxgwMdwkZiFMC7Dqo5o6ONB4PGYY9DDIee9I6OnhIMgzmEuPoBh8Uw8hxWUO0sQ/Mi4gwRPBJMgwSXojAh7mQ5AiAeUnWLacY7OU8D0NZBoY3MD5JhkE0y970yKs3RE0qZHgT7EWkWEOPSTgfi+FYYxHZS7AEjCwGMtBdzngWTsPQAx2BZd8ge5kow0jBI8QweKmClldHSEkLAKKofGCACnTsAAAAAElFTkSuQmCC)
. Тому що
![](data:image/png;base64,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)
й
![](data:image/png;base64,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)
, то промінь
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACQAAAAXCAYAAABj7u2bAAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAAFmSURBVEjH7ZaxjcIwFIbfAAwAEmYHeDsYF9QUiagOUSE31MhJl4YF6JjjmOA2uIIN2OGIbWwSJ05QEilwonABGL/P//+/l0Acx/BK66VgPkD/H0hwNkXK18/sDRBOAPCnF7kyLqZRiAsMo0UnQEmyGbAxnOsOlEUVBAYn978GrBMgc+MqIANTtkeI1Qgn8+MmSQatgZTUlO4JkF/fDaWdBOCaVaYAhKFonSFVCIODvj1eVkKMyvZtKdk9Y0krIOk9RbqXMlcB2YyM2bnOklZA+U5Jl6egsgPg4rOrEyC3RRVcX0AmNwW10oKPFs7bp9X0W2qst/Cp4oRud7VAKiuOEgbCHCA/zyd4zBa3XeZASYAZkB8Tdk7pUv6uv599uxcoyn7PiyluB10mRzziQxcoPwAz+ys6M0BycLuykc9lCjVZIWNfbiZ7A/I913oBUjHwdGQjIDufGgxCPdEfGXNV+rygvR3QDaHQvMOQkc1dAAAAAElFTkSuQmCC)
збігається із променем
![](data:image/png;base64,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)
, а промінь
![](data:image/png;base64,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)
збігається із променем
![](data:image/png;base64,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)
. Звідси витікає, що вершина
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABUAAAAXCAYAAADk3wSdAAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAAD0SURBVEjHY2hsbGSgNmYYNZS+hkYZMyxkYGD4D8Gybzzy6g0boo19jKMbfEg2FKQRbJBx1EKYWEdHGo+HDMMemOEkGQozEJtr6utjJY3l3GeldXTwEG1ofZ6HoSwDwxtkF2IYahxdT1KY5rjJFhPjPaINhYeZjMceQt4j2lCw1xgY7uLy+uAxFJEuje/G1tdLoisEBY+bsVstKGjgDgCmElm3nGLiYh/NYJAhRgyyp2ARmOfmFgaSh4gb7UZ3BAM2F0ESOSwngTB210N8J9uLnloozufRHh7J6KmFIgNxlQMUGYgrpZBlICTnIcIc3bUjvOQHADcDxZHD4vM+AAAAAElFTkSuQmCC)
збігається з вершиною
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABMAAAAXCAYAAADpwXTaAAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAADQSURBVDjLY2hsbGSgFmYYNYy6hkUZMyxkYGD4D8Gybzzy6g0boo19jKMbfIg2DKQBbIBx1EKYWEdHGo+HDMMemKFEGQYzCJvt9fWxksZy7rPSOjp4CBpWn+dhKMvA8AbZRRiGGUfXExVmOW6yxfi8QXQEwMNExmMPLm8QbRjYCwwMd3F5ceAMQ6Qr47ux9fWS6ApBweBm7FYLCgJEMkFViz020RSBXG3EIHsKOWJABrrLGc/CaRhq4oSlfBDGdC1RhhGLR4hh8BIFKZGPkJIWAPDbgW/YfTCVAAAAAElFTkSuQmCC)
.
Отже, трикутник
![](data:image/png;base64,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)
збігається із трикутником
![](data:image/png;base64,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)
, а виходить, дорівнює трикутнику
![](data:image/png;base64,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)
.
Теорема доведена.
Теорема 2.3 (Третя ознака рівності трикутників по трьох сторонах).
Якщо три сторони одного трикутника рівні відповідно трьом сторонам іншого трикутника, то такі трикутники рівні.
Доведення.
Нехай
![](data:image/png;base64,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)
і
![](data:image/png;base64,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)
два трикутники, у яких
![](data:image/png;base64,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)
. Потрібно довести, що трикутники рівні.
Допустимо, трикутники не рівні. Тоді в них
![](data:image/png;base64,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)
. Інакше вони були б рівні по першій ознаці.
Нехай
![](data:image/png;base64,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)
- трикутник, дорівнює трикутнику
![](data:image/png;base64,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)
, у якого вершина
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABUAAAAXCAYAAADk3wSdAAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAAD0SURBVEjHY2hsbGSgNmYYNZS+hkYZMyxkYGD4D8Gybzzy6g0boo19jKMbfEg2FKQRbJBx1EKYWEdHGo+HDMMemOEkGQozEJtr6utjJY3l3GeldXTwEG1ofZ6HoSwDwxtkF2IYahxdT1KY5rjJFhPjPaINhYeZjMceQt4j2lCw1xgY7uLy+uAxFJEuje/G1tdLoisEBY+bsVstKGjgDgCmElm3nGLiYh/NYJAhRgyyp2ARmOfmFgaSh4gb7UZ3BAM2F0ESOSwngTB210N8J9uLnloozufRHh7J6KmFIgNxlQMUGYgrpZBlICTnIcIc3bUjvOQHADcDxZHD4vM+AAAAAElFTkSuQmCC)
лежить в одній напівплощині з вершиною
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABMAAAAXCAYAAADpwXTaAAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAADQSURBVDjLY2hsbGSgFmYYNYy6hkUZMyxkYGD4D8Gybzzy6g0boo19jKMbfIg2DKQBbIBx1EKYWEdHGo+HDMMemKFEGQYzCJvt9fWxksZy7rPSOjp4CBpWn+dhKMvA8AbZRRiGGUfXExVmOW6yxfi8QXQEwMNExmMPLm8QbRjYCwwMd3F5ceAMQ6Qr47ux9fWS6ApBweBm7FYLCgJEMkFViz020RSBXG3EIHsKOWJABrrLGc/CaRhq4oSlfBDGdC1RhhGLR4hh8BIFKZGPkJIWAPDbgW/YfTCVAAAAAElFTkSuQmCC)
відносно прямій
![](data:image/png;base64,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)
(рисунок 2.4).
![](data:image/jpeg;base64,/9j/4AAQSkZJRgABAQEAYABgAAD/2wBDAAgGBgcGBQgHBwcJCQgKDBQNDAsLDBkSEw8UHRofHh0aHBwgJC4nICIsIxwcKDcpLDAxNDQ0Hyc5PTgyPC4zNDL/wAALCAB+AJ8BAREA/8QAHwAAAQUBAQEBAQEAAAAAAAAAAAECAwQFBgcICQoL/8QAtRAAAgEDAwIEAwUFBAQAAAF9AQIDAAQRBRIhMUEGE1FhByJxFDKBkaEII0KxwRVS0fAkM2JyggkKFhcYGRolJicoKSo0NTY3ODk6Q0RFRkdISUpTVFVWV1hZWmNkZWZnaGlqc3R1dnd4eXqDhIWGh4iJipKTlJWWl5iZmqKjpKWmp6ipqrKztLW2t7i5usLDxMXGx8jJytLT1NXW19jZ2uHi4+Tl5ufo6erx8vP09fb3+Pn6/9oACAEBAAA/APf6KKKKKKyvEurnQPDGqausXnNZ20kyx54YqpIB9q53S7DUrddB1G+8USm4nBuNQhmmURzKYySsaYwqqxTkY46k5rt+oyKKzNW8Q6VoclvHqN15D3LFYV8tmLt6DaDz7VZ0/UbPVbNbuwuY7iBiQHQ5GQcEH0IPBB5FWqKKKKKKKKKKKKKZLFHPC8M0ayRSKVdHGQwPBBHcVwWrQ+DNLFz4Wtr2wtNY1Czazt4buZ5fLVxhUAYnYucEKMZwMdq7u2SSO1hSXb5ioA+zOM45xntUtcJ4hupG+I2kSzWGpSafpFrPceZBZSSpJcSAIqDapyQhc56DPXNaHgLSr/TtL1G71KI29zqupT6gbYkEwK5G1DjjOFBOO5NdXXI6rqeoal45g8MWF3JYQQ2X2+8uY1UyMC+xI03AhckMScHgADFa/h8ahFYyQ6rfxXlyJ5THIm0EwhyEJCgDOAM8dc1r0UUUUUUUUUUV87fEP4fXXiL4tau+h3D/AG2LTI9SZGPLSghBGp/hJVQQT3/Tv/Ca614j8PW2q6L45vwDlJrbUrKCcxSr95GKqjZB9+mD3rbx8Q7U9fDeooPUTWrn/wBGCvL5/i145tfiuui3GkL5CzrC+lWyCV2XGSySEKWOPmB4GOvc16ePiNpkIJ1LS9e0wDq13pcu3/vpAw/Wrln8QPCF8QsHiTTN56JJcLG35Ng1zt/4n8Caz48h0oatPDrqp9lW5s5XjDgnPkmReDzzjsehBrTsfCEun+O49Ttbayg0mC08iFUlcy5KgHKkYx8o43Y6kgscjs6KKKKKKKKKKK8/8GL9u+JHjrVjyFuILCP2EcfzfqRVTXY3+HPi1vFVqrHw9qsqx6zCo4t5ScLcAehJw317kjHoF9qVpp+lXGp3EyrZwQtO8gORsAzkevFefx+GtSufBEmv+SV8VTXQ1yNT95ZAPkt/XHlfusepNd9o+q22uaNZ6pZtut7uFZYyeoBGcH3HQ+9Zni2fRLDRpLzWNOt78ZEcNs8CyPcStwsaAjlif8egryjTfhZa6H8RvC+p6oUSbUJ57hrK1ULBbXCDzY41PdQAR9U9Divd6KKKKKKKKKKKCcDJ6CuA+EA+0eD7rVyPm1bU7q9JPfMhUf8AoNdxe2VtqNjPZXkKTW06GOWNxwykYINeOwQX2n+IbH4VapOsmktcLeWtzJIN09km5xbkdzvUD/dU9sV7TXFaDPD4U17W/D91IkGnKjatYu5wiQMczJnoAkmW+kgp3h+3n8VaxH4t1GJ47OJSui2jggpGwwbhx/fcdB/CvuTU3j0m2ttD1QHAsNYtndvRJGMLfpLXW0UUUUUUUUUUVh+MtROk+CdbvwcPBYysh/2tp2/riq/w/sDpnw90C0K7WWxiZx6My7j+pNdFJIkUbSSMERAWZmOAAOpNeWp4Q/4Tzw9qHiVme01jUbhbzSLk5V7WOLIt/oGGXbH/AD09QK6vwJ4qbxPozrexfZtasH+zajakYMco7gf3W6j8R2rjfH8z+J7x72ysku9H8Ly+Zfvzm7O5fOt0weVVAWbOQWCrjg16vbzw3NtFPbuskMqB43XoykZBHtisDx/YtqHgDXbdP9YLN5Y8D+NBvX9VFbGl3yanpFlfx/cuoEmX6MoI/nVuiiiiiiiiiiuC+MUjt8PZ9PiOJtSureyj+rSKf5A13UUawwpEgwiKFUegFcp46le/gsfCts7LPrcpimZTgx2q/NO34rhB7uK6uKKOCFIYkVI41CoqjAUDgAV5D8TxLonib+2/DdzcQ6s1i39sRWse5vsWQvnegdf4Seu30U16T4at9Gj8K6fDogjfSWtx5GOQ6Hkk56k5JOeck5rH8DO2ltqfhKZmLaPKPspbOXtJMtFyeu35o/8AgFddJGssTRuMq4KsPUGuV+Gskh8BadbTHMtiZLF8+sMjR/yUV1lFFFFFFFFFFeXeM9c0/XPHHhDw9HI6TW+sG5uIriJoseSjFSNwAYEngjINeo1x3hX/AIn3iLV/Fb5aBmOnaae3kRt87j/fkzz6ItWPFnjez8KjyJrW4e8nRRZKUKxXErHaI/M+6pzgndjAOeateGfDzaRY3EuoSpd6tqDedqFxjiR8YCKD0jUfKo9PcmvKzrt38O/F1z4Y0idp9DuLxXtVji3tBO3zNZIzfKCxZOScIrZ6mvQfFjHRNW0fxdtEcduwstT56W0pADE+kcm1voWrrp5o7e3knlbbHGhdzgnAAyeBXlPg/wAVXP8AwmWqaNZQPHZTao94VmtZDcGOZFb7nAiTcS29zk5AC5r1qiiiiiiiiiivNdY06z8T/Gu307ULOK7stN0R5njmQMvmSSBRwe+BnPtXReM72fTfDsOl6SfL1DUpE06y2/8ALLcPmf6IgZv+AitWJNM8K+G44zIlrpum2wXe54SNFxknucD8TXPaDpMnia5m8S+IbMFLqIwWGnXKAi3tW6l1PHmSYBbOcAKvY11Om6ba6Rp8VjYxmO2iyI0Ls20Ek4BJJxzwOw4HFYHiTwBovieK+N7G/wBouYBFFNnP2Yg7t8Y/hYtgk9WwAeKy/B+rS+INK1TwZ4rjDazYxm2vVJ/4+oGGFmX1DA8n19M4rV8EXlxcaDNpGoyO2o6RK2n3L5Ks4Ufu5M9fmjKNn1J9Kz9E0uy8NfEu707TrdLe1v8ASI5wgJJaSKVlZiTyzESrkkkmu5oooooooooorz/waPt/xM8dapnckc1tYxn08uP5x+ZFX9Nz4h+IF/qpw1joitp9p3DXDYadx9Bsj/77qE/8V54i2D5vDOkz/Mf4dQulPT/ajjP4M47ha7eiiuG+IGhX4e08XeHo92u6QCfKHS7tz9+E468ZI9+nJFU7TxBYz69oXjDTZM6Xr8a6beA/8spxkwlv9oNvjP8AvL7Vr+JibTxv4P1DO2N57iwkPr5sRdR/31CK66iiiiiiiiikJABJOAOpNeTeDNafS/hjq3iSGLzb/WdVuJbSM9Zp5ZfKiX6ZA/AGtcWk1tp9l8PdDu3F0sAk1fUUPzQI5y7Z7SysW29wCW7Cu60+wtdL0+3sLGBILW3QRxRoOFUdKs0UUV494y0hPCd9fRM/k+E/EjlbhlXjTb44Mc49FLKpPoR9BWtq+tyav8MrPXrqMR6ho+oW8t7GP+WcsM6rN07bd5HsRXpdFFFFFFFFFYvjDUP7K8Ga3fg4aCxmdTn+LYcfrivKdHu5LKy8LaRZ2y3N3pVnH9ls2yFl1GePeWb0SGJ2dj280d8V6v4a0BPD+mmJpmur6dzPe3jjDXEx+8x9B2A6AACtmiiiiqeq6XZ61pV1pl/CJrW5jMciHuD/ACI6g9jXh2j2ep+HvEHiX4c6xIZoNZ06QaZckY85ljKqT/tbAAfeMfWvZvCuonV/COj6iTlrmyilb/eKAn9c1r0UUUUUUUV5l8ddetdM+HN3pzXKJeaiUjhiz8zKHUuQPQAdfeqfwug0LQtM/tfWvEWky6/fqXkzeRf6OjHd5ajPB6Z+gHRRXon/AAk+gf8AQc0z/wAC4/8AGj/hJ9A/6Dmmf+Bcf+NN/wCEq8O5I/t/S8jr/pkfH61S1Px34b022SX+17C4eSaOFY4bqMkl2C5PzYAAJJJ6AGqmifEjw/rc7pHdw28aQrN5lxcRqDuZwq43Z3FVD47Blzg8Vtf8JPoH/Qc0z/wLj/xo/wCEn0DGf7c0zH/X3H/jXKeP4dE8SaTFLY6/ptvrumSfatNn+1xgrKvO08/dbAB/A9qz/gp4u0/WPCFvo5uYV1azMpltQCpVDIxBX1UBgOOleoUUUUUUUUVwHxF+Fdl8QrixuZdRmsZ7VTHuSMOHQnOMEjB9/ertj8LvBFpZw2f9gWFw8Eao0k0StI/GNzH1OM1Z/wCFa+Cv+hX0v/wHWj/hW3gof8yvpf8A4DLS/wDCt/BWP+RX0rkY/wCPZf8ACsLW/g54a1S6je2sbKxhWLyzHDbAEkuhZsgjnYrKvHBcnnir2k/CnwlY2Rju9E068uHlkleVrYAfMxYKoycKoIUDPQVe/wCFa+Cv+hX0v/wHWk/4Vp4JP/Mr6Z/34FMl+HHgVU/e+G9KRTxkwqv61zXgL4NWXgvxTJrsWsSXqeWyW0flhdobqWYE7jjjgD1r1KiiiiiiiiszxBrtl4b0W41S/kCQxDhcgGRj91F9yeK888K6tJoXjTxPL4iYQ3U+m2+o3WybzwuwyBtoQZCqpXAxnABPWvVI5FliWRDlHAZT6g06iiiiivPPilPa3f8AYGgSS2CSXmoLO5vcGNYoQ0jbuQQCVC9RnJFN+G2oW9rYNBKkizatqd3JbtFCVtZAmPmhH8EZUZAJyTuPNei0UUUUUUUUhUMMMAfqKqanpsOq6Xd6fOXSK6haGRo8BtrDBwSD2qe2gFtaw26uziJAgZ8ZOBjJx3qWiiiiimtGj/eRW+ozVC90eK91TTr95545LBnaNI2ARty7TuBHPHuK0aKK/9k=)
Рис.2.4 До доведення 3 признаку рівності трикутників [8]
Нехай
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABEAAAARCAYAAAA7bUf6AAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAAC7SURBVDjLY2hsbGSgFDMMbkOijBkWMjAw/MfAxlELSXJJjptsMQOD8d3Y+npJEL++PlbSmIHhLoOMx560jg4eogwBuwbN5oZoYx+Qi4yjG3wIGgKzFV0x3DVohmM1BGIjwisw3NGRxuMhw7CHKEPAXsHid6JdArNN1i2nGMObeR6GsgwMb9DlGLArlL3pkVdviD3qMb2JPWqxeAVXzGAYAvMzunNhiQ+bASiGQBIXllQKwlhcNoQyIKkYAMD4oBsy6Ly0AAAAAElFTkSuQmCC)
середина відрізка
![](data:image/png;base64,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)
й
![](data:image/png;base64,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)
- рівнобедрені із загальною основою
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACQAAAAXCAYAAABj7u2bAAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAAE6SURBVEjH7Va7DcIwEL0BGAAkzA5wOxgX1BSJUiFRITfUyEmXhgXomAMmYAc2yA6AEzk4cCaRXfARxWuce8/Pd75zIMsy+CR8lJm/od8zFCHsAeBSgRVCqnEa4wzjdNYm7MslFzWxFMJob9byfNkTQzgacZdgCJc0ZASpkyiVDHA03S3zvPfKjA+XNKSkGDOAwj7dkyjGivwWwHUaWnG27pJWCiFc0lBd56E4tqX1ESFcp6EypQBnV8pfIYT7PYbuswPPiVIDqiwc+Uamsl+1cDOuC9eUsz7ArSMZX63bu+xBWAtMgJ3MhdUbTEe4a8R05GpIzuc6pvo2Odjx7gtaT1mN5iaUoa7c54nOtrZZrzq7DPkgFmJhd+ZbDVFv29sMlc8M0ZVeYvVL7jkIq6l+v2d2lv4/aF9n6Appubve23HojAAAAABJRU5ErkJggg==)
. Тому їхні медіани
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й
![](data:image/png;base64,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)
перпендикуляри прямої
![](data:image/png;base64,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)
. Прямі
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й
![](data:image/png;base64,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)
не збігаються, тому що точки
![](data:image/png;base64,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)
не лежать на одній прямій. Але через точку
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABEAAAARCAYAAAA7bUf6AAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAAC7SURBVDjLY2hsbGSgFDMMbkOijBkWMjAw/MfAxlELSXJJjptsMQOD8d3Y+npJEL++PlbSmIHhLoOMx560jg4eogwBuwbN5oZoYx+Qi4yjG3wIGgKzFV0x3DVohmM1BGIjwisw3NGRxuMhw7CHKEPAXsHid6JdArNN1i2nGMObeR6GsgwMb9DlGLArlL3pkVdviD3qMb2JPWqxeAVXzGAYAvMzunNhiQ+bASiGQBIXllQKwlhcNoQyIKkYAMD4oBsy6Ly0AAAAAElFTkSuQmCC)
прямої
![](data:image/png;base64,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)
можна провести тільки одну перпендикулярну їй пряму. Ми прийшли до протиріччя
Теорема доведена.
Задача 2.1 Відрізки
![](data:image/png;base64,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)
й
![](data:image/png;base64,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)
перетинаються в точці
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, що є серединою кожного з них. Чому дорівнює відрізок
![](data:image/png;base64,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)
, якщо відрізок
![](data:image/png;base64,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)
м?
Розв’язок. Трикутники
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й
![](data:image/png;base64,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)
рівні по першій ознаці рівності трикутників (рисунок 2.5).
![](data:image/jpeg;base64,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)
Рис.2.5 До задачі 2.1 [8]
У них кути
![](data:image/png;base64,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)
й
![](data:image/png;base64,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)
рівні як вертикальні, а
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEAAAAATCAYAAAAgcwuHAAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAAF+SURBVFjD7ZexrcIwEIZvABZAwkOg28FKwQRBdE9UKA01MunSMAR7sMgr2IAd3lNsLrKN7bNRqHBxjWM7/31390eBvu/hm+Ork68AKgAGQItwBYA/CtyeN9yFqmvWKLufTwnmNPnPdWB7LQJw3uJmPCjk4eivpSAMw37RrOCWA6o0SjQdpDgC4H2n1FKp3RIB7jEI0ReFktB0V81tPwyLVHXmBlCqSa89E6aixHS77cvQMgkasiGRKOVJgPhtOrWeK/lSTbSfYE0AcjrAtI54xBKIARjnXmB7MZUKA3o3SjX5GlJFcwBwrRKrxHhOojyNZzgAQYNKmNU7mgywfON2qwjwsE0mZw5fkkp4RHH7F2oiYLSfO58NIFYJPfcWEM4k5wQQ0mT2ux6UPQIpswnNIc39SzckvrmlI1CqSa9ZQLgRipig2+ZGtPsi3XrepX77zWuCvCaCZb+fgGeNQMxEbPpTRZ7P6GKaxU/4AKcp+HyK+Nej/gtUABVABTDGPwAX3LMtv0H3AAAAAElFTkSuQmCC)
й
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEQAAAATCAYAAAApmKv9AAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAAGESURBVFjD7ZcxssIgEIb3AF7AGfEOPu4QU3gCM7ZWjo21g+lyhtd5D0/gDSy8gXd4b0gGwgN2gSeZsaDYImSz+/OxCwTatoVioxUIBUgBkg/IlsMVAH6U8eayifNlr/ooVpeGb6hv3rWQPvu9Nr69JgGRE5EfsupwssfspGrcTNJ1+1m9gJsCkxtEir5DxU4A/LkTYi6fhdjNOcATFvVt33WzIBAssCZuBKJ8+8TL9bcvaQ4YMfr0mFURVAx3EpIeUlJDCQ60xbFeMYAX5tvH4o3ICSNFn+lvT5yKA2554WVuJgz5TmEp+sZKGJ+dlqaAaCekt0yqId/UzTBm00vRR7VQdIWoFjA3KqzvQqU7haXoMwH6/KlYUU726nwaEF/1DP7s4Wsvu7X8QIhJ+nqXCioFVrw6Y+30n5ZJ1dePedqFOmGQTfWv8yDe3cj0KWNBkcK/gN2n2Gxj9Sl4djWphaAui2jSmFvdeAEzV9hfNbmhYPqc96ZFHALl/6UAKUAKkHfsF+X1Tj89HKWTAAAAAElFTkSuQmCC)
тому, що точка
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAATCAYAAACZZ43PAAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAACkSURBVDjLY2hsbGSgBDMMcwOijBkWMjAw/Idh4+gGH6IMaIg29gFpkHXLKUYXQzcEp2ZstoFdJOOxJ62jgwerAfX1sZLGDAx3GYyjFuL2kvHd2Pp6SawG5LjJFjMwyL7xyKs3JNmAjo40Hg8Zhj3oTiTkOoSCPA9DWQaGN8gBR0zYEGUAPtcRFYD4wgaLQlRnQgIOd8AyYLcNkfpwRelIyY3EYAD757hOqry5qAAAAABJRU5ErkJggg==)
є серединою відрізків
![](data:image/png;base64,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)
і
![](data:image/png;base64,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)
. З рівності трикутників
![](data:image/png;base64,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)
і
![](data:image/png;base64,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)
треба рівність їхніх сторін
![](data:image/png;base64,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)
і
![](data:image/png;base64,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)
. А тому що за умовою задачі
![](data:image/png;base64,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)
м, те й
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADsAAAATCAYAAAAu2nXoAAAAAXNSR0ICQMB9xQAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAAFSSURBVFjD7VfLDYJAEJ0CaIDELcJsD4aDFUi8ciJeLGDlRhv2QSMe6IAeNCD7YX0DqGBM4DCHxcfuezNvZpGyLKOlxGKErmIXJ/Yg6UpE907Iw3UQA3BTRZ4nQbShgjZRkeR54P+e7sRZc5DxZf9WZZ8vy/KoVKjUMZREpS/ExdRrg2MIfRpm31oM2PsSy73PFQlmD2gq14rjsupiugfz2f0mmuR6HDQ397yGA0hKbyb1BkasI4zLIOeCucSqU7QVJG7RSW37nrFiXVvY/rRrhHnprR+JRTy4QvT0qx06yJJNAoBVxlSWHW4DQ25ysboyYpeerSWo0muE6YgF+J9XtuUwKBb53bcx1xOc5f+2Z/0N0SRGh74ziae0MZrGHD84hV0LamLG1gDj4ua4cobmhHvVjLpn/aFkQ1TaDjwGX/azfFR4nCb5glr/CKxiV7F/GQ9RdlU4ISRheAAAAABJRU5ErkJggg==)
м.