配套习题- 弧，弦，圆心角 -【青果学院】

挑战习题

1/5单选题

难度：

1.下列语句中正确的是（　　）

A	相等的圆心角所对的弧相等
B	平分弦的直径垂直于弦
C	长度相等的两条弧是等弧
D	经过圆心的每一条直线都是圆的对称轴

提示1：: 5qC55o2u5ZyG44CB5ZyG5b+D6KeS44CB5byn44CB5bym55qE55u45YWz55+l6K+G6L+b6KGM6Kej562U5Y2z5Y+v77yO

正确答案：RA==

6Kej77yaQeOAgeWcqOWQjOWchuaIluetieWchuS4re+8jOebuOetieeahOWchuW/g+inkuaJgOWvueeahOW8p+ebuOetie+8m+aVhUHplJnor6/vvJs8YnI+QuOAgeW5s+WIhuW8pu+8iOS4jeaYr+ebtOW+hO+8ieeahOebtOW+hOWeguebtOS6juW8pu+8m+aVhULplJnor6/vvJs8YnI+Q+OAgeWcqOWQjOWchuaIluetieWchuS4re+8jOiDveWkn+mHjeWQiOeahOS4pOadoeW8p+aYr+etieW8p++8m+aVhUPplJnor6/vvJs8YnI+ROOAgeWchuaYr+i9tOWvueensOWbvuW9ou+8jOi/h+WchuW/g+eahOS7u+aEj+S4gOadoeebtOe6v+mDveaYr+WchueahOWvueensOi9tO+8jOaVhUTmraPnoa7vvJs8YnI+5pWF6YCJRO+8jg==

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2/5单选题

难度：

2.如图，AB是⊙O的直径，

，∠COD=34°，则∠AEO的度数是（　　）

A	51°
B	56°
C	68°
D	78°

提示1：: PGltZyB3aWR0aD05NCBoZWlnaHQ9Mjkgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8xMC81Ny9yQkFDRkZWaWxfbnlBR3JKQUFBRkpXSjNsb2c5MzAucG5nIj4s5Y+v5rGC5b6X4oigQk9DPeKIoEVPRD3iiKBDT0Q9MzTCsO+8jOe7p+iAjOWPr+axguW+l+KIoEFPReeahOW6puaVsA==

提示2：: 5YaN5qC55o2u562J6IWw5LiJ6KeS5b2i55qE5oCn6LSo5ZKM5LiJ6KeS5b2i5YaF6KeS5ZKM5a6a55CG5p2l5rGC4oigQUVP55qE5bqm5pWw77yO

正确答案：QQ==

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3/5单选题

难度：

3.如图，在△ABC中，∠C=90°，∠B=28°，以C为圆心，CA为半径的圆交AB于点D，交BC于点E，则弧AD的度数为( )

A	28°
B	34°
C	56°
D	62°

提示1：: 6aaW5YWI5qC55o2u55u06KeS5LiJ6KeS5b2i55qE5Lik5Liq6ZSQ6KeS5LqS5L2Z77yM5b6X5Yiw4oigQT05MMKwLeKIoEI9NjLCsO+8jg==

提示2：: 5YaN5qC55o2u562J6L655a+5562J6KeS5Lul5Y+K5LiJ6KeS5b2i55qE5YaF6KeS5ZKM5a6a55CG5b6X5Yiw4oigQUNE55qE5bqm5pWw77yM6L+b5LiA5q2l5b6X5Yiw5YW25omA5a+555qE5byn55qE5bqm5pWw77yO

正确答案：Qw==

6Kej77ya4oi15Zyo4pazQUJD5Lit77yM4oigQUNCPTkwwrDvvIziiKBCPTI4wrA8YnI+4oi04oigQT05MMKwLeKIoEI9NjLluqbvvI48YnI+4oi1Q0E9Q0Q8YnI+4oi04oigQ0RBPeKIoENBRD02MsKwPGJyPuKItOKIoEFDRD01NsKwPGJyPuaVhemAiUPvvI48YnI+PGltZyB3aWR0aD0xMjUgaGVpZ2h0PTE0OSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzEwLzU3L3JCQUNGRlZpbUFDd2ZVWWdBQUFXM210bXZMbzY4My5wbmciPg==

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4/5单选题

难度：

4.如图所示，小华从一个圆形场地的A点出发，沿着与半径OA夹角为α的方向行走，走到场地边缘B后，再沿着与半径OB夹角为α的方向折向行走．按照这种方式，小华第五次走到场地边缘时处于弧AB上，此时∠AOE=52°，则α的度数是( )

A	51.5°
B	60°
C	72°
D	76°

提示1：: 6KaB5rGCzrHnmoTluqbmlbDvvIzlj6rpnIDmsYLlh7riiKBBT0LnmoTluqbmlbA=

提示2：: 5qC55o2u5bey55+l5p2h5Lu277yM5piT6K+B4oigQU9CPeKIoEJPQz3iiKBDT0Q94oigRE9F77yM5omA5Lul5Y+v5Lul5rGC5Ye6zrHnmoTluqbmlbDvvI4=

正确答案：QQ==

6Kej77ya6L+e5o6lT0TvvI48YnI+4oi14oigQkFPPeKIoENCTz3Ose+8jDxicj7iiLTiiKBBT0I94oigQk9DPeKIoENPRD3iiKBET0XvvIw8YnI+4oi14oigQU9FPTUywrDvvIw8YnI+4oi04oigQU9CPe+8iDM2MMKwLTUywrDvvInDtzQ9NzfCsO+8jDxicj7iiLTOsT3vvIgxODDCsC03N8Kw77yJw7cyPTUxLjXCsO+8jjxicj7mlYXpgIlB77yOPGJyPjxpbWcgd2lkdGg9MTQyIGhlaWdodD0xMzQgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8xMC81Ny9yQkFDRkZWaW1BT1JzQldZQUFBUkEyVGZ4NzgzMjcucG5nIj4=

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5/5单选题

难度：

5.已知弦AB把圆周分成1：5的两部分，则弦AB所对应的圆心角的度数为（）

A	30°
B	30°或150°
C	60°
D	60°或300°

提示1：: QULmiYDlr7nlupTnmoTlnIblv4Pop5LnmoTluqbmlbDmmK/vvIzlsLHmmK8zNjDluqbnmoQ8aW1nIHdpZHRoPTI1IGhlaWdodD0yNCBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzEwLzU3L3JCQUNGRlZpbUFienJSYkpBQUFCQVNVOE11bzk2Ni5wbmciIGFsdD3mlbDlrablhazlvI8+77yM5o2u5q2k5Y2z5Y+v5rGC6Kej77yO

正确答案：Qw==

6Kej562U77ya4oi15bymQULmiorlnIblkajliIbmiJAx77yaNeeahOS4pOmDqOWIhu+8jDxicj7iiLRBQuaJgOWvueW6lOeahOWchuW/g+inkueahOW6puaVsOaYr++8mjM2MMKww5c8aW1nIHdpZHRoPTI1IGhlaWdodD0yNCBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzEwLzU3L3JCQUNGRlZpbUFienJSYkpBQUFCQVNVOE11bzk2Ni5wbmciIGFsdD3mlbDlrablhazlvI8+PTYwwrDvvI48YnI+5pWF6YCJQ++8jg==

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