Question

If the diameter of the semicircle is 1.7 centimeters, what is the perimeter of this figure in centimeters?

25.7 cm

26.669 cm

29.338 cm

5.069 cm

Answer 1

The answer is D

Explanation:

Answer 2

`5.069\ cm`

Explanation:

we know that

The perimeter of the figure is equal to the circumference of a semicircle plus two times the length of
`12` mm

Find the circumference of a semicircle

The circumference of a semicircle is equal to

`C=\pi D/2`

we have

`D=1.7\ cm`

substitute

`C=(3.14)(1.7/2)=2.669\ cm`

convert
`12`mm to cm

`12\ mm=1.2\ cm`

The perimeter of the figure is equal to

`2.669\ cm+2*1.2\ cm=5.069\ cm`