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A circular region with a 半径 of 12 km is under typhoon signal number 1, What is the area of the circular region

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解答

Acircularregionwitharadiusof12kmisundertyphoonsignalnumber1,Whatistheareaofthecircularregion

解答

area:144πkm2
+1
十进制
452.38934…
求解步骤
Given:radius:12km
给定 r=12的圆面积:A=144π
area:144πkm2

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