Circular flowerbed

We split the circular flowerbed with diameter 8 m by concentric circle to circle and annulus with the same area. Find the radius of the circle.

Correct answer:

r =  2.83 m

Step-by-step explanation:

D=8 m S1/2=S2 π(D/2)2/2=πr2 D2/8=r2 r=D/8=8/8 r=2.83 m

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