配套习题- 圆的内接四边形 -【青果学院】

1/5单选题

难度：

1.圆内接四边形ABCD中，∠A，∠B，∠C的度数比为3：2：7，则∠D的度数为（）

A	144°
B	36°
C	72°
D	112°

正确答案：QQ==

6Kej77ya4oi15ZyG5YaF5o6l5Zub6L655b2iQUJDROS4re+8jOKIoEHvvIziiKBC77yM4oigQ+eahOW6puaVsOavlOS4ujPvvJoy77yaN++8jDxicj7orr7iiKBBPTN477yM4oigQj0yeO+8jOKIoEM9N3jvvIw8YnI+5qC55o2u5ZyG5YaF5o6l5Zub6L655b2i5a+56KeS5LqS6KGl77yM4oi04oigQSviiKBDPTN4Kzd4PTE4MMKw77yMPGJyPuKItHg9MTjCsO+8jDxicj7iiLTiiKBEPTE4MMKwLTJ4PTE4MMKwLTM2wrA9MTQ0wrDvvI48YnI+5pWF562U5qGI5Li677yaMTQ0wrDvvI4=

2/5单选题

难度：

2.如图，四边形ABCD内接于⊙O，若它的一个外角∠DCE=70°，则∠BOD=( )

A	35°
B	70°
C	110°
D	140°

正确答案：RA==

6Kej77ya4oi15Zub6L655b2iQUJDROWGheaOpeS6juKKmU/vvIw8YnI+4oi04oigQT3iiKBEQ0U9NzDCsO+8jDxicj7iiLTiiKBCT0Q9MuKIoEE9MTQwwrDvvI48YnI+5pWF6YCJRO+8jg==

3/5单选题

难度：

3.如图，⊙O中，ABDC是圆内接四边形，∠BOC=110°，则∠BDC的度数是（）

A	110°
B	70°
C	55°
D	125°

正确答案：RA==

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

4/5单选题

难度：

4.如图，AB是⊙O的直径，C，D是⊙O上两点，∠BAC=40°，则∠D的度数为（）度．

A	110°
B	120°
C	130°
D	140°

正确答案：Qw==

6Kej77ya4oi1QULmmK/iiplP55qE55u05b6E77yMPGJyPuKItOKIoEFDQj05MMKw77yMPGJyPuKItOKIoEI9OTDCsC00MMKwPTUwwrDvvIw8YnI+4oi04oigRD0xODDCsC01MMKwPTEzMMKw77yO

5/5单选题

难度：

5.如图，四边形ABCD为⊙O的内接四边形，点E在CD的延长线上，如果∠BOD=120°，那么∠BCE等于（）

A	30°
B	60°
C	90°
D	120°

正确答案：Qg==

6Kej77ya4oi14oigQT08aW1nIHdpZHRoPTggaGVpZ2h0PTIyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvN0IvMDIvckJBQ0oxVmltc3Z6VFdpREFBQUExRTRQSnR3MDY2LnBuZyIgYWx0PeaVsOWtpuWFrOW8jz7iiKBCT0Q9NjDCsO+8jDxicj7iiLTiiKBCQ0U94oigQT02MMKw77yOPGJyPuaVhemAiULvvI4=