Calculate area of the quatrefoil which is inscribed in a square with side 6 cm.

Correct result:

S =  20.5487 cm2


a=6 cm r=a/2=6/2=3 cm S1=π r2/4=3.1416 32/47.0686 cm2 S2=2 S1r2=2 7.0686325.1372 cm2 S=4 S2=4 5.1372=20.5487 cm2

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