To find the perimeter of the curved section of the semi-circle: Perimeter of semicircle = Pi x radiusIf you also need to the find the perimeter of the straight part of the semicircle (the diameter),...
The circumference of a circle = 2π r = π a (where a is the base of the semicircle and is also the diameter of the circle)The perimeter of the semicircle = half the perimeter of the circle + the...