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 base length The perimeter of the semicircle = πa/2 + a = a(1 + π /2) feet
A half circle is called a semicircle.
The prefix semi means half. Therefore a semicircle is half a circle. Other examples semidetached, semitrailer, semifinal
The equation for area of a circle is A=pi x R x R. A semicircle is half a circle, so we calculate the area of a circle and divide by 2. The area of the circle would be approximately 1384.74. Thus the area of the semicircle would be 692.37.
Semicircle is HALF of a circle!
Half of A circle
It is a half a circle STUPID!!!!!
A semicircle, or a breve.