弓形弦AB=2cm,高为根号3cm.求AB的度数及弓形弧ACB的面积
弓形弦AB=2cm,高为根号3cm.求AB的度数及弓形弧ACB的面积
数学人气:389 ℃时间:2019-08-18 23:33:24
优质解答
60度;8pie/3cm^2
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