What is the area of a circle whose radius is the diagonal of a square whose area

游客2024-01-12 59

问题 What is the area of a circle whose radius is the diagonal of a square whose area is 4?

选项 A、2π
B、2π

C、4π
D、8π
E、16π

答案 D

解析

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Inthecoordinateplane,pointsAandBareendpointsofadiameterofacircle