中学生网络课堂本课配套习题挑战模式1/5
单选题
难度系数：
1.
△ABC中，AD是∠BAC的平分线，且AB=AC+CD. 若∠BAC=60°，则∠ABC的大小为（ ）
| A: 40° |
| B: 60° |
| C: 80° |
| D: 100° |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5Y+v5ZyoQULkuIrlj5ZBQ+KAsj1BQ++8jOWImeeUsemimOS4readoeS7tuWPr+W+l0JD4oCyPUPigLJE77yM5Y2z4oigQz3iiKBBQ+KAskQ9MuKIoEI8L3A+PHA+4oCL4oCLPGltZyBzdHlsZT0id2lkdGg6IDEzNnB4OyBoZWlnaHQ6IDEyOHB4OyIgYWx0PSIiIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMzgvREIvckJBQ0UxTVdsOF9EOEJSSEFBQVNHUVdrekNVMDk3LnBuZyIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8zOC9EQi9yQkFDRTFNV2w4X0Q4QlJIQUFBU0dRV2t6Q1UwOTcucG5nIj7igIs8L3A+
- 提示2：PHA+5YaN55Sx5LiJ6KeS5b2i55qE5YaF6KeS5ZKM5Y2z5Y+v5rGC6Kej4oigQueahOWkp+WwjzwvcD4=
- 答案：QQ==
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
本课配套习题挑战模式2/5
单选题
难度系数：
2.
△ABC中，∠C=90°，BE平分∠ABC，ED⊥AB于点D，若AC=3cm，则AE+DE的结果为（ ）
| A: 5cm |
| B: 4cm |
| C: 3cm |
| D: 6cm |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5qC55o2u6KeS5bmz5YiG57q/5oCn6LSo5b6X5Ye6Q0U9REXvvIzku6PlhaXmsYLlh7rljbPlj68uPC9wPg==
- 答案：Qw==
PGRpdj7op6PvvJriiLXiiKBDPTkwwrDvvIxCReW5s+WIhuKIoEFCQ++8jEVE4oqlQULvvIw8YnI+4oi0Q0U9REXvvIw8YnI+4oi1QUM9M2Nt77yMPGJyPuKItEFFK0RFPUFFK0VDPUFDPTNjbe+8jDxicj7mlYXpgIlDLjwvZGl2Pg==
本课配套习题挑战模式3/5
单选题
难度系数：
3.
如图，在△ABC中，AD是△ABC的角平分线，AC=AB+BD，下列正确的是（ ）
| A: ∠B=∠C |
| B: ∠B=2∠C |
| C: ∠B=3∠C |
| D: ∠B= |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+QUTmmK/ilrNBQkPnmoTop5LlubPliIbnur/vvIzlnKhBQ+S4iuWPlueCuUXvvIzkvb/lvpdBRT1BQu+8jOaYk+ivgeKWs0FCROKJjOKWs0FFRO+8jOWPr+W+l0VDPUJEPURFPC9wPjxwPuKAi+KAizxpbWcgc3R5bGU9IndpZHRoOiAxNTlweDsgaGVpZ2h0OiAxMDBweDsiIGFsdD0iIiBkYXRhLWNrZS1zYXZlZC1zcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzE1L0I2L3JCQUNGRk1XbUR6QkJIZlpBQUFPb2xLdmlEZzE3OS5wbmciIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMTUvQjYvckJBQ0ZGTVdtRHpCQkhmWkFBQU9vbEt2aURnMTc5LnBuZyI+4oCLPC9wPg==
- 提示2：PHA+4pazRURD5piv562J6IWw5LiJ6KeS5b2i77yM5YiZ5Y+v5b6X4oigQj0y4oigQzwvcD4=
- 答案：Qg==
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
本课配套习题挑战模式4/5
单选题
难度系数：
4.
如图，在Rt△ABC中，∠C=90°，斜边AB的垂直平分线交AB于点D，交BC于点E，AE平分∠BAC，那么下列关系中不成立的是（ ）
| A: ∠B=∠CAE |
| B: ∠DEA=∠CEA |
| C: BE=2EC |
| D: AC=2EC |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5YiG5p6Q77ya5qC55o2u57q/5q615Z6C55u05bmz5YiG57q/55qE5oCn6LSo77yMQUU9QkXvvIzliJniiKBCPeKIoERBRe+8jOWGjeeUsUFF5bmz5YiG4oigQkFD77yM5b6X4oigQkFFPeKIoENBRS4g5LuO6ICM5b6X5Ye6562U5qGILjwvcD4=
- 答案：RA==
PGRpdj7op6PnrZTvvJpB44CB4oi1RUTiiqVBQu+8jOS4lEJEPUFE77yMPGJyPuKItOKIoEI94oigREFF77yMPGJyPuWPiOKItUFF5bmz5YiG4oigQkFD77yMPGJyPuKItOKIoENBRT3iiKBEQUXvvIw8YnI+5pWF4oigQj3iiKBDQUUuIOato+ehru+8mzxicj5C44CB5Zyo4pazQURF5LiO4pazQUNF5Lit77yM4oigQ0FFPeKIoERBRe+8jOKIoEM94oigQURFPTkwwrDvvIw8YnI+5qC55o2u5LiJ6KeS5b2i5YaF6KeS5ZKM5a6a55CG4oigREVBPeKIoENFQS4g5q2j56Gu77ybPGJyPkPjgIHiiLVFROKKpUFC77yM5LiUQkQ9QUTvvIziiLTiiKBCPeKIoEJBRe+8jOato+ehru+8mzxicj5E44CB5LiN5LiA5a6a5oiQ56uLLjxicj7mlYXpgIlELjwvZGl2Pg==
本课配套习题挑战模式5/5
单选题
难度系数：
5.
如图，已知四边形ABCD中，AD∥BC，若∠DAB的平分线AE交CD于E，连接BE，且BE恰好平分∠ABC，则AB的长与AD+BC的大小关系是（ ）
| A: AB＞AD+BC |
| B: AB＜AD+BC |
| C: AB=AD+BC |
| D: 无法确定 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+55Sx5LqOQULkuI5BROOAgeS4jkJD5LmL6Ze05rKh5pyJ5LuA5LmI55u05o6l55qE6IGU57O777yM5omA5Lul5b+F6aG76YCa6L+H5L2c6L6F5Yqp57q/5bu656uLQULkuI5BROOAgUJD5LmL6Ze055qE6IGU57O777yM6L+b6ICM5pa55Y+v5rGC6KejLjwvcD4=
- 提示2：PHA+5bu26ZW/QUXkuqRCQ+W7tumVv+e6v+S6jkbvvIzor4HilrNBREXiiYzilrNGQ0U8L3A+PHA+PGltZyBoZWlnaHQ9IjEzOCIgd2lkdGg9IjE3MCIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8yMy9GNi9yQkFDRTFNTWh6ZWlWOW5lQUFBVmpRRHZrVkEzMTIucG5nIiBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzIzL0Y2L3JCQUNFMU1NaHplaVY5bmVBQUFWalFEdmtWQTMxMi5wbmciPuKAizwvcD4=
- 答案：Qw==
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
