Question

Why is the approximate perimeter of a semi circle with a radius of 8 m?

Answer 1

hello :
the perimeter of a circle is : P=2πr r :radius r = 8m
P= 2×3.14×8 = 50.24
the approximate perimeter of a semi circle with a radius of 8 m is :P/2 =25.12m

Answer 2

Circumference of a circle with radius 8 =
c = 2 pi 8
For semi circle we will divide this by 2 and then add the base segment which is the length of the radius * 2.
p = (2 * 3.14 * 8)/2 + 16
perimeter = 41.12 m