Question

The radius of a semicircle is 4 millimeters. What is the semicircle's area?

Answer 1

Answer:

Semicircle Area and Perimeter

Area (A)

25.1327

in²

A = πr²/2 = 8 * π [in²] ≈ 25.1327 [in²]

Perimeter (L)

20.5664

in

L = πr + d = 4 * π + 8 [inch] ≈ 20.5664 [inch]