What is the formula for a semicircle

Formula for semicircle is A = pi (3.14) • r^2/2

Area = πr^2/2, and Perimeter πr+2r

Step-by-step explanation:

so the formula for a circle is πr^2, and a semicircle is half of a circle ... so we do the formula of a circle, πr^2, divided by 2 to get the area of it, πr^2/2. now we kind of do the same thing for perimeter. we do the circumference/2, so 2πr/2, or πr but we need to add the bottom of the semicircle so we add 2r to it. so this whole equation would be πr+2r.