The figure is made up of two shapes a semicircle and a square. What is the exact perimeter of the figure? A. 4pi + 16 cm B. 2pi + 12 cm C. 2pi + 6 cm D. 4pi + 12cm

Question

asked Feb 8, 2018 164k views

2 Answers

Tobias Windisch · Answer 1 · 2018-02-15T04:34:54+0000

Answer:

Option B
$(2 \pi+12)\ cm$

Explanation:

see the attached figure to better understand the problem

we know that

The perimeter of the figure is equal to sum the length of semicircle plus the length of three sides of a square

Find the length of semicircle

Remember that the circumference of semicircle is equal to

$C=(1)/(2)\pi D$

we have

$D=4\ cm$

substitute

$C=(1)/(2)\pi(4)=2 \pi\ cm$

The perimeter of the figure is equal to

$P=2 \pi+3(4)=(2 \pi+12)\ cm$