Question

Find the circumference of a circle with an area of 1809.56 square centimeters

Answer 1

150.8cm

Explanation:

Area= π r²

make r subject of the formula

A = π r²

A/π= πr² (dividing both sides by π)

r²= A/ π

r =

`\sqrt{ (a)/(\pi) }`

r=√(1809.56)/(π)

r=√576.0008

r≈24cm

:. circumference= 2π r

= 2× π × 24

=150.7964

≈150.8cm