将正△ABC绕点C按顺时针方向旋转一定角度后得正△A'B'C'.已知∠BCA'=150°,则∠ACB'=____
将正△ABC绕点C按顺时针方向旋转一定角度后得正△A'B'C'.已知∠BCA'=150°,则∠ACB'=____
数学人气:799 ℃时间:2020-02-01 05:54:18
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150-60-60=30
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