本课配套习题挑战模式1/5
单选题
难度系数:
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° |
一次做对,真牛!
+5奖励规则>
- 提示1:5qC55o2u5ZyG5YaF5o6l5Zub6L655b2i5a+56KeS5LqS6KGl77yM5rGC5Ye64oigQeS4juKIoELvvIziiKBD55qE5bqm5pWw5Y2z5Y+v5b6X5Ye6562U5qGI77yO
- 答案:QQ==
6Kej77ya4oi15ZyG5YaF5o6l5Zub6L655b2iQUJDROS4re+8jOKIoEHvvIziiKBC77yM4oigQ+eahOW6puaVsOavlOS4ujPvvJoy77yaN++8jDxicj7orr7iiKBBPTN477yM4oigQj0yeO+8jOKIoEM9N3jvvIw8YnI+5qC55o2u5ZyG5YaF5o6l5Zub6L655b2i5a+56KeS5LqS6KGl77yM4oi04oigQSviiKBDPTN4Kzd4PTE4MMKw77yMPGJyPuKItHg9MTjCsO+8jDxicj7iiLTiiKBEPTE4MMKwLTJ4PTE4MMKwLTM2wrA9MTQ0wrDvvI48YnI+5pWF562U5qGI5Li677yaMTQ0wrDvvI4=
本课配套习题挑战模式2/5
单选题
难度系数:
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° |
一次做对,真牛!
+5奖励规则>
- 提示1:55Sx5ZyG5YaF5o6l5Zub6L655b2i55qE5aSW6KeS562J5LqO5a6D55qE5YaF5a+56KeS55+l77yM4oigQT3iiKBEQ0U9NzDCsO+8jOeUseWchuWRqOinkuWumueQhuefpe+8jOKIoEJPRD0y4oigQT0xNDDCsO+8jg==
- 答案:RA==
6Kej77ya4oi15Zub6L655b2iQUJDROWGheaOpeS6juKKmU/vvIw8YnI+4oi04oigQT3iiKBEQ0U9NzDCsO+8jDxicj7iiLTiiKBCT0Q9MuKIoEE9MTQwwrDvvI48YnI+5pWF6YCJRO+8jg==
本课配套习题挑战模式3/5
单选题
难度系数:
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° |
一次做对,真牛!
+5奖励规则>
- 提示1:6aaW5YWI6YCa6L+H5ZCM5byn5omA5a+555qE5ZyG5b+D6KeS5LiO5ZyG5ZGo6KeS55qE5YWz57O75rGC5Ye66KeSQQ==
- 提示2:5YaN5Yip55So5ZyG5YaF5o6l5Zub6L655b2i55qE5a+56KeS5LqS6KGl77yM5Y+v5Lul5rGC5Ye64oigQkRD77yO
- 答案:RA==
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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,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° |
一次做对,真牛!
+5奖励规则>
- 提示1:5qC55o2u55u05b6E5omA5a+555qE5ZyG5ZGo6KeS5piv55u06KeS5b6X4oigQUNCPTkwwrDvvIzliJniiKBCPTkwwrAtNDDCsD01MMKw
- 提示2:5o2u5ZyG5YaF5o6l5Zub6L655b2i55qE5a+56KeS5LqS6KGl5rGC5b6X4oigRD0xODDCsC01MD0xMzDCsO+8jg==
- 答案:Qw==
6Kej77ya4oi1QULmmK/iiplP55qE55u05b6E77yMPGJyPuKItOKIoEFDQj05MMKw77yMPGJyPuKItOKIoEI9OTDCsC00MMKwPTUwwrDvvIw8YnI+4oi04oigRD0xODDCsC01MMKwPTEzMMKw77yO
本课配套习题挑战模式5/5
单选题
难度系数:
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° |
一次做对,真牛!
+5奖励规则>
- 提示1:5qC55o2u5LiA5p2h5byn5omA5a+555qE5ZyG5ZGo6KeS562J5LqO5a6D5omA5a+555qE5ZyG5b+D6KeS55qE5LiA5Y2K77yM5rGC5b6X4oigQT02MMKw
- 提示2:5qC55o2u5ZyG5YaF5o6l5Zub6L655b2i55qE5aSW6KeS562J5LqO5a6D55qE5YaF5a+56KeS5rGC6Kej77yO
- 答案:Qg==
6Kej77ya4oi14oigQT08aW1nIHdpZHRoPTggaGVpZ2h0PTIyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvN0IvMDIvckJBQ0oxVmltc3Z6VFdpREFBQUExRTRQSnR3MDY2LnBuZyIgYWx0PeaVsOWtpuWFrOW8jz7iiKBCT0Q9NjDCsO+8jDxicj7iiLTiiKBCQ0U94oigQT02MMKw77yOPGJyPuaVhemAiULvvI4=