设半径为R,则圆的周长为2πR
再半圆的周长为D,D=2R+πR=10.8
解得:R=10.8÷(2+π)=2.101厘米
怎样求半圆的半径(周长10.8厘米,求半径,算式,是半圆
怎样求半圆的半径(周长10.8厘米,求半径,算式,是半圆
数学人气:901 ℃时间:2019-08-20 16:39:23
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