The formula for the perimeter of a whole circle is 2 π r
therefore the perimeter of a half circle will be
(2 π r)/2
which is
π r
n.b. the perimeter of a circle is normally referred to as the circumference...
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Let r be the radius of the circle. Then the perimeter of the half circle is pi*r + 2r. That is half of the circumference plus the diameter.
Its perimeter is half of its circumference plus its diameter
The perimeter of a circle is called the circumferenceTo find the circumference of a circle you do 2 times pi times radiusC = 2 * 3.14159 * 7 = 43.98inchesSince this is a half circle you have to take half of the circumference...you answer is 21.99inches
The circumference of a circle is the length of the circle's perimeter.
When the shape is a circle, then the perimeter is called"circumference".The circumference IS the perimeter of a circle.