配套习题- 圆的相关概念 -【青果学院】

挑战习题

1/5单选题

难度：

1.下列说法中，结论错误的是（　　）

A	直径相等的两个圆是等圆
B	长度相等的两条弧是等弧
C	圆中最长的弦是直径
D	一条弦把圆分成两条弧，这两条弧可能是等弧

提示1：: 5Yip55So5ZyG55qE5pyJ5YWz5a6a5LmJ6L+b6KGM5Yik5pat5ZCO5Yip55So5o6S6Zmk5rOV5Y2z5Y+v5b6X5Yiw5q2j56Gu55qE562U5qGI77yb

正确答案：Qg==

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2/5单选题

难度：

2.下列语句中，不正确的个数是（　　）
①直径是弦；②弧是半圆；③长度相等的弧是等弧；④经过圆内一定点可以作无数条直径．

A	1个
B	2个
C	3个
D	4个

提示1：: 5qC55o2u5bym44CB5byn44CB562J5byn55qE5a6a5LmJ5Y2z5Y+v5rGC6Kej77yO

正确答案：Qw==

4pGgIOaNruebtOW+hOeahOamguW/te+8jOefpeebtOW+hOaYr+eJueauiueahOW8pu+8jOaVheato+ehru+8mzxicj7ikaHmoLnmja7lvKfnmoTmpoLlv7XvvIznn6XljYrlnIbmmK/lvKfvvIzkvYblvKfkuI3kuIDlrprmmK/ljYrlnIbvvIzmlYXplJnor6/vvJs8YnI+4pGi5qC55o2u562J5byn55qE5qaC5b+177ya5Zyo5ZCM5ZyG5oiW562J5ZyG5Lit77yM6IO95aSf5LqS55u46YeN5ZCI55qE5byn5piv562J5byn77yO6ZW/5bqm55u4562J55qE5Lik5p2h5byn5LiN5LiA5a6a6IO95aSf6YeN5ZCI77yM5pWF6ZSZ6K+v77ybPGJyPuKRo+WmguaenOivpeWumueCueWSjOWchuW/g+S4jemHjeWQiO+8jOagueaNruS4pOeCueehruWumuS4gOadoeebtOe6v++8jOWImeWPquiDveS9nOS4gOadoeebtOW+hO+8jOaVhemUmeivr++8jjxicj7mlYXpgIlD77yO

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3/5单选题

难度：

3.下列语句中，不正确的是（）

A	圆既是中心对称图形，又是旋转对称图形
B	圆既是轴对称图形，又是中心对称图形
C	当圆绕它的圆心旋转89°57′时，不会与原来的圆重合
D	圆的对称轴有无数条，对称中心只有一个

提示1：: 5qC55o2u5ZyG5piv6L205a+556ew5Zu+5b2i55qE5oCn6LSo77yM5Lul5Y+K5ZyG55qE5peL6L2s5LiN5Y+Y5oCn5Y2z5Y+v5rGC6Kej77yO

正确答案：Qw==

6Kej77yaQeOAgeWboOS4uuWchuaXi+i9rOS7u+aEj+S4gOS4quinkuW6pumDveiDveWkn+S4juiHqui6q+mHjeWQiO+8jOaJgOS7peWchuS4jeS7heaYr+S4reW/g+WvueensOWbvuW9ou+8jOS5n+aYr+aXi+i9rOWvueensOWbvuW9ou+8jOato+ehru+8mzxicj5C44CB5q2j56Gu77ybPGJyPkPjgIHmoLnmja5B55+l6ZSZ6K+v77ybPGJyPkTjgIHku7vmhI/ov4flnIblv4PnmoTnm7Tnur/pg73mmK/lnIbnmoTlr7nnp7DovbTvvIzmnInml6DmlbDmnaHvvIzlr7nnp7DkuK3lv4PljbPmmK/lnIblv4PvvIzmnInkuIDkuKrvvIzmraPnoa7vvI48YnI+5pWF6YCJQ++8jg==

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4/5单选题

难度：

4.有两个圆，⊙O₁的半径等于地球的半径，⊙O₂的半径等于一个篮球的半径，现将两个圆都向外膨胀（相当于作同心圆），使周长都增加1米，则半径伸长的较多的圆是（）

A	⊙O₁
B	⊙O₂
C	两圆的半径伸长是相同的
D	无法确定

提示1：: 55SxTD0yz4BS6K6h566X5Ye65Y2K5b6E55qE5Ly46ZW/6YeP77yM54S25ZCO5q+U6L6D5aSn5bCP

正确答案：Qw==

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5/5单选题

难度：

5.如图，甲顺着大半圆从A地到B地，乙顺着两个小半圆从A地到B地，设甲、乙走过的路程分别为a、b，则( )

A	a=b
B	a＜b
C	a＞b
D	不能确定

提示1：: 5qC55o2u5Zu+5b2i77yM5b6X5Lik5Liq5bCP5Y2K5ZyG55qE55u05b6E5LmL5ZKM562J5LqO5aSn5Y2K5ZyG55qE55u05b6E77yM5YiZ5qC55o2u5ZyG5ZGo6ZW/5YWs5byP77yM5b6X5LqM5Lq65omA6LWw55qE6Lev56iL55u4562J77yO

正确答案：QQ==

6Kej77ya6K6+55Sy6LWw55qE5Y2K5ZyG55qE5Y2K5b6E5pivUu+8juWImeeUsuaJgOi1sOeahOi3r+eoi+aYr++8ms+AUu+8jjxicj7orr7kuZnmiYDotbDnmoTkuKTkuKrljYrlnIbnmoTljYrlvoTliIbliKvmmK/vvJpyPHN1Yj4xPC9zdWI+5LiOcjxzdWI+Mjwvc3ViPu+8jOWImXI8c3ViPjE8L3N1Yj4rcjxzdWI+Mjwvc3ViPj1S77yO5LmZ5omA6LWw55qE6Lev56iL5piv77yaz4ByPHN1Yj4xPC9zdWI+K8+AcjxzdWI+Mjwvc3ViPj3PgO+8iHI8c3ViPjE8L3N1Yj4rcjxzdWI+Mjwvc3ViPu+8iT3PgFLvvI7lm6DogIxhPWLvvI48YnI+5pWF6YCJQe+8jg==

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