用圆规和直尺怎么画出115度的角?
人气:236 ℃ 时间:2020-01-28 18:08:21
解答
115+90=15
先画个90度,就是作180度的角平分线(会吧?)
旁边画任意长为半径的圆,以圆上任意一点为起点,六次截取半径长(最后应该又回终点的),联结任意两相邻的半径.其夹角为60度,再作角平分线的角平分线(就15啦),相加就OK了
(貌似很麻烦,一楼不可能实现的,你怎么得到115/360的?)
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