Question

4) The diameter of a semicircle is 34.4 miles. What is the semicircle's perimeter?

() Use 3.14 for and round your answer to the nearest hundredths.

Answer 1

88.41

`c = 2\pi \: r`

but this is only semi circle so,

`c = \pi \: r`

so,

c= 3.14 x 34.4/2(radius)

= 54.008

P = diameter + circumference of a semi circle

= 34.4+54.008

=88.408

=88.41 miles