如图,已知在RT△ABC中,角ABC=90°,AB=4
如图,已知在RT△ABC中,角ABC=90°,AB=4,分别以AC、BC为直径作半圆,面积分别记为S1、S2,则S1+S2的值等于多少?...
如图,已知在RT△ABC中,角ABC=90°,AB=4,分别以AC、BC为直径作半圆,面积分别记为S1、S2,则S1+S2的值等于多少?
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八分之一乘以π再乘以AB的平方,就是2π。
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