约等于6.88平方厘米
长方形周长2×（长+宽）=24,得长方形长=8,宽=4
长方形面积4*8=32
半圆面积3.14*4*4/2=50.24/2=25.12
阴影面积32-25.12=6.88平方厘米
长方形中有一个半圆,长方形周长24厘米,圆的直径是长方形的长,求阴影的面积?
长方形中有一个半圆,长方形周长24厘米,圆的直径是长方形的长,求阴影的面积?
数学人气：902 ℃时间：2019-11-25 12:43:39
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