如图，在Rt△ABC中，∠ACB=90°，AC= 3 ，以点C为圆心，CB的长为半径画弧，与AB边交于点D，将 BD^ 绕点D旋转180°后点B与点A恰好重合，则图中阴影部分的面积为_1_刷题宝

题干

如图，在Rt△ABC中，∠ACB=90°，AC= 3 ，以点C为圆心，CB的长为半径画弧，与AB边交于点D，将 BD^ 绕点D旋转180°后点B与点A恰好重合，则图中阴影部分的面积为____．

上一题下一题 0.0难度选择题更新时间:2019-09-12 08:47:37

答案(点此获取答案解析）

\frac{\sqrt{3}}{2}

\ufe63

同类题1

How do we know the weather? We learn it on the radio and TV every day. Different countries have different weather. For example, the weather in Australia is different from that in China. Because the seasons in Australia are the opposite. Its summer is from December to February. But in our country, it's winter this time. And its winter is in June, July and August. So when it's spring in China, it's autumn in Australia. Isn't it interesting?

同类题2

先化简，再求值:

\frac{x}{x^{2} - 1} \cdot (\frac{x - 1}{x} - 2)

x (x + 1) = 2 (x + 1)

同类题3

解方程：2（x﹣2）²=（x﹣2）

同类题4

如图，在△ABC中，AB=AC，以AB为直径作半圆O，交BC于点D，连接AD，过点D作DE⊥AC，垂足为点E，交AB的延长线于点F．

同类题5

Drivers usually have _____ good sense of direction.

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