What is the perimeter of a semicircle with a diameter of 18?

The perimeter is 56.52 units

The The perimeter of a circle is π × d where d is the diameter

So

P = pi * d

since d is 18 so putting in the equation

P = 3.14 * 18

P = 56.52

A is the answer

Step-by-step explanation:

the center of the circle is (-2,-1) so you're going to reverse their signs and insert that value in for x and y. the radius is 5, but the equation of a circle is

so you're going to square the radius, this making it 25.