如图,已知圆上两点A,B.
(1)用直尺和圆规求作圆心(保留作图痕迹,不写画法);
(2)若AB=6,此圆的半径为2
,求弦AB与劣弧AB所组成的弓形面积.
(1)用直尺和圆规求作圆心(保留作图痕迹,不写画法);
(2)若AB=6,此圆的半径为2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/2018/11/17/2077590014115840/2078199911047168/STEM/89d2682e10e34dc9b0484f63297304bf.png?resizew=109)
更新时间:2018-11-18 14:11:27
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【知识点】 求扇形面积
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适中
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解答题-证明题
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适中
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【推荐2】如图,
是半圆
的直径,
是半圆
上不同于
、
两点的任意一点,
是半圆
上一动点,
与
相交于点
,
是半圆
所在圆的切线,与
的延长线相交于点
.
(1)若
,求证:
;
(2)若
,
,
.求
;(答案保留
)
(3)若
,
为
的中点,点
从
移动到
时,请直接写出点
移动的长度.(答案保留
)
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