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.在锐角
中，角A,B所对的边长分别为a,b.若2a
=
b，则角A等于（ ）
中，角A,B所对的边长分别为a,b.若2a=b，则角A等于（ ） A: |
B: |
C: |
D: |
一次做对，真牛！
+5奖励规则>
- 提示1：IOato+W8puWumueQhuaKiui+ueWMluS4uuinku+8jGHlr7nlupQ8aW1nIHdpZHRoPTI5IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzJGLzE2L3JCQUNKbFNqaDM2elJZQWVBQUFCZ0dWNVJ3RTM1Ny5wbmciPu+8jGLlr7nlupQ8aW1nIHdpZHRoPTMwIGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzJGLzU1L3JCQUNKMVNqaDM2U0pVaFlBQUFCWk5MdHpTTTQ3Ni5wbmciPg==
- 答案：RA==
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
本课配套习题挑战模式2/5
单选题
难度系数：
2.在中，内角A,B,C的对边分别为a,b,c.若a
=
b，且a
，则
=（ ）
中，内角A,B,C的对边分别为a,b,c.若a=b，且a，则=（ ） A:  |
| B: |
C:  |
D:  |
一次做对，真牛！
+5奖励规则>
- 提示1：IOato+W8puWumueQhui+ueWMluinkg==
- 提示2：IOi/kOeUqOS4ieinkuWHveaVsOeahOS4pOinkuWSjOWFrOW8jw==
- 提示3：IOacgOWQjuWvueaxguW+l+eahDxpbWcgd2lkdGg9MTggaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMkYvMTcvckJBQ0psU2poNHZDejFjLUFBQUJRaGNkeVYwNjMwLnBuZyI+6L+b6KGM5Y+W6IiN
- 答案：QQ==
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
本课配套习题挑战模式3/5
单选题
难度系数：
3.在中，角A,B,C的所对边的长分别为a,b,c.若
，则
的最小值为（ ）
中，角A,B,C的所对边的长分别为a,b,c.若，则的最小值为（ ） A:  |
B:  |
| C: |
D: |
一次做对，真牛！
+5奖励规则>
- 提示1：IOW6lOeUqOS9meW8puWumueQhg==
- 提示2：IOW6lOeUqOWfuuacrOS4jeetieW8j+eahOefpeivhg==
- 答案：Qw==
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
本课配套习题挑战模式4/5
单选题
难度系数：
4.在中，
=，AB=
，BC=3，则
=（ ）
中，=，AB=，BC=3，则=（ ） A:  |
B:  |
C:  |
D:  |
一次做对，真牛！
+5奖励规则>
- 提示1：IOe7meWumuS6huS4pOi+ueWPiuWkueinku+8jOWImeiAg+iZkeWIsOW6lOeUqOS9meW8puWumueQhg==
- 提示2：IOeUseS9meW8puWumueQhuaxguW+l0FD6L656ZW/
- 提示3：IOWGjeagueaNruato+W8puWumueQhuaxguWHujxpbWcgd2lkdGg9MjkgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMkYvMTYvckJBQ0psU2poMzZ6UllBZUFBQUJnR1Y1UndFMzU3LnBuZyI+
- 答案：Qw==
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
本课配套习题挑战模式5/5
单选题
难度系数：
5.如图，在
中，D是边AC上的点，且AB=AD，2AB=
，BC=2BD，则
的值为（ ）
中，D是边AC上的点，且AB=AD，2AB=，BC=2BD，则的值为（ ） A:  |
B:  |
C:  |
D: |
一次做对，真牛！
+5奖励规则>
- 提示1：IOmAieaLqemimO+8jOiuvuWumuacgOeugOS+v+aYk+S6juiuoeeul+eahOaVsOWAvOaWueS+v+ino+mimC4=
- 提示2：IOeUqOiuvuWumueahOS4iei+ueeahOaVsOWAvOaxguWHujxpbWcgd2lkdGg9MjkgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvOTAvMUMvckJBQ0ZGU2ppb1N4RnpQREFBQUJnQzBTTE1VNTA5LnBuZyI+55qE5YC8
- 提示3：5q2j5bym5a6a55CG5rGCPGltZyB3aWR0aD0yOSBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC85MC8xQy9yQkFDRkZTamlvVEQ5Z2tnQUFBQllVb09DblE3OTUucG5nIj4=
- 答案：RA==
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
