1/5单选题
难度：
1.如图，一圆内切四边形ABCD，且BC=10，AD=7，则四边形的周长为（ ）
| A | 32 |
| B | 34 |
| C | 36 |
| D | 38 |
- 提示1：
- 5qC55o2u5YiH57q/6ZW/5a6a55CG77yM5Y+v5Lul6K+B5piO5ZyG5aSW5YiH5Zub6L655b2i55qE5oCn6LSo77ya5ZyG5aSW5YiH5Zub6L655b2i55qE5Lik57uE5a+56L655ZKM55u4562J77yM5LuO6ICM5Y+v5rGC5b6X5Zub6L655b2i55qE5ZGo6ZW/77yO
正确答案：Qg==
6Kej77ya55Sx6aKY5oSP5Y+v5b6X5ZyG5aSW5YiH5Zub6L655b2i55qE5Lik57uE5a+56L655ZKM55u4562J77yMPGJyPuaJgOS7peWbm+i+ueW9oueahOWRqOmVvz0yw5fvvIg3KzEw77yJPTM077yOPGJyPuaVhemAie+8mkLvvI4=
2/5单选题
难度：
2.如图，正方形ABCD边长为4cm，以正方形的一边BC为直径在正方形ABCD内作半圆，过A作半圆的切线，与半圆相切于F点，与DC相交于E点，则△ADE的面积（ ）
| A | 12 |
| B | 24 |
| C | 8 |
| D | 6 |
- 提示1：
- 55Sx5LqOQUXkuI7lnIZP5YiH5LqO54K5Ru+8jOagueaNruWIh+e6v+mVv+WumueQhuaciUFGPUFCPTRjbe+8jEVGPUVD77yb
- 提示2：
- 6K6+RUY9RUM9eGNt77yO5YiZREU977yINC1477yJY23vvIxBRT3vvIg0K3jvvIljbe+8jA==
- 提示3：
- 54S25ZCO5Zyo5LiJ6KeS5b2iQkNF5Lit55Sx5Yu+6IKh5a6a55CG5Y+v5Lul5YiX5Ye65YWz5LqOeOeahOaWueeoi++8jOino+aWueeoi+WNs+WPr+axguWHug==
- 提示4：
- 54S25ZCO5bCx5Y+v5Lul5rGC5Ye64pazQURF55qE6Z2i56ev77yO
正确答案：RA==
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
3/5单选题
难度：
3.如图，PA，PB分别是⊙O的切线，A，B分别为切点，点E是⊙O上一点，且∠AEB=60°，则∠P为（ ）
| A | 120° |
| B | 60° |
| C | 30° |
| D | 45° |
- 提示1：
- 6L+e5o6lT0HvvIxCTw==
- 提示2：
- 55Sx5ZyG5ZGo6KeS5a6a55CG55+l5Y+v55+l4oigQU9CPTLiiKBFPTEyMMKw77yMUEHjgIFQQuWIhuWIq+WIh+KKmU/kuo7ngrlB44CBQg==
- 提示3：
- 5Yip55So5YiH57q/55qE5oCn6LSo5Y+v55+l4oigT0FQPeKIoE9CUD05MMKw
- 提示4：
- 5qC55o2u5Zub6L655b2i5YaF6KeS5ZKM5Y+v5rGC5b6X4oigUD0xODDCsC3iiKBBT0I9NjDCsO+8jg==
正确答案：Qg==
6Kej77ya6L+e5o6lT0HvvIxCT++8mzxicj7iiLXiiKBBT0I9MuKIoEU9MTIwwrDvvIw8YnI+4oi04oigT0FQPeKIoE9CUD05MMKw77yMPGJyPuKItOKIoFA9MTgwwrAt4oigQU9CPTYwwrDvvI48YnI+5pWF6YCJQu+8jjxicj48aW1nIHdpZHRoPTE4NSBoZWlnaHQ9MTIwIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvN0IvMDIvckJBQ0oxVmltOXFUWVRPZUFBQVY3V2FYXzBJNTI1LnBuZyIgYWx0PemdkuaenOWtpumZoj4=
4/5单选题
难度：
4.如图所示，P为⊙O外一点，PA、PB分别切⊙O于A、B，CD切⊙O于点E，分别交PA、PB于点C、D，若PA=15，则△PCD的周长为（ ）
| A | 15 |
| B | 12 |
| C | 20 |
| D | 30 |
- 提示1：
- 55u05o6l5Yip55So5YiH57q/6ZW/5a6a55CG5b6X5Ye6QUM9RUPvvIxCRD1ERe+8jEFQPUJQ77yM6L+b6ICM5rGC5Ye6562U5qGI77yO
正确答案：RA==
6Kej77ya4oi1UOS4uuKKmU/lpJbkuIDngrnvvIxQQeOAgVBC5YiG5Yir5YiH4oqZT+S6jkHjgIFC77yMQ0TliIfiiplP5LqO54K5Re+8jOWIhuWIq+S6pFBB44CBUELkuo7ngrlD44CBRO+8jDxicj7iiLRBQz1FQ++8jEJEPURF77yMQVA9QlDvvIw8YnI+4oi1UEE9MTXvvIziiLTilrNQQ0TnmoTlkajplb/kuLrvvJpQQStQQj0zMO+8jjxicj7mlYXpgInvvJpE77yO
5/5单选题
难度：
5.如图，P为⊙O外一点，PA，PB分别切⊙O于A，B，CD切⊙O于点E，分别交PA，PB于点C，D．若PA=5，则△PCD的周长和∠COD分别为（ ）
| A | 5， |
| B | 7， |
| C | 10， |
| D | 10， |
- 提示1：
- 5qC55o2u5YiH57q/6ZW/5a6a55CG77yM5Y2z5Y+v5b6X5YiwUEE9UELvvIxFRD1BRO+8jENFPUJD77yM5LuO6ICM5rGC5b6X5LiJ6KeS5b2i55qE5ZGo6ZW/PTJQQe+8mw==
- 提示2：
- 6L+e5o6lT0HjgIFPReOAgU9C5qC55o2u5YiH57q/5oCn6LSo77yM4oigUCviiKBBT0I9MTgwwrA=
- 提示3：
- 5qC55o2uQ0TkuLrliIfnur/lj6/nn6XiiKBDT0Q9PGltZyB3aWR0aD03IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0IwLzcyL3JCQUNFMVZpbTlfREt3TUNBQUFCSkh2OVRiQTAxMC5wbmciPuKIoEFPQg==
正确答案：Qw==
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