Question

Calculate the radius of a circle of its area is 4cm2

Answer 1

To find the radius of a circle given the area, use the next formulas:

Ac= 4π cm²

Ac = π*r²

Circumference = π * diameter

Solve the equation for x:

4π cm² = π*r²

4 = π*r² / π

4 = r²

√4 = r

2 = r