If the perimeter of a semicircle measures 144 cm, what is the length of its radius?

Explanation

The perimeter of a semicircle is given by the formula P = πr + 2r. Setting P = 144 cm, we solve for r: 144 = r(π + 2). Using π ≈ 3.14, r = 144 / (3.14 + 2) ≈ 28 cm.