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如何用圆规和直尺把一个圆五等分

更新时间: 2020-09-16 00:00:00     

步骤:

1、在圆上,作任意直径AB;

2、过O作半径OC垂直于AB;

3、作AO中点D,连接CD;

4、在AB上截取DE等于CD,连接CE;

5、以C为圆心,CE为半径画弧,交圆O于F,弧CF就等于5分之1圆周;

6、用圆规量取弧CF的长度,依次画线,即可把圆分成5等分。

关键词: 何用 圆规 直尺 一个 等分

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