Question

The perimeter of a circle is 4Πr cm. What is the area of the circle?

Answer 1

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Answer 2

given

PERIMETER = 4 pie r

2 pie R = 4 pie r

so R = 4pie r ÷ 2 pie

R = 2r

so AREA OF CIRCLE

= pie R^2

=pie (2r ×2r)

= pie ( 4r^2)

= 4 pie r^2