Question

The diagram shows a circle inside a square.

a O
16 cm
Work out the area of the circle.

Answer 1

perimeter of circle=2πr

16=2πr

r=16/2π=8/πcm

now.

area of circle=πr²=π(8/π)²=π×64/π²=64/(22/7)=64×7/22=20.36cm²