Answer:
4π + 33 or 45.6
Step-by-step explanation:
For this question, you need to identify the perimeter of the semicircle and the 3 sides of the trapezoid.
The perimeter of the semicircle would be (this is the equation for a circle divided by two):
(2πr)/2 or (πd)/2
To figure this out, you don't need to know the radius, because you can just use the diameter, in which case if you plug it in you would get:
(8π)/2
→ 4π
Now you would just add the perimeter of the semicircle to the perimeter of the 3 sides of the trapezoid to get:
4π + (10+13+10)
→ 4π + 33
Now all you'd need to do is round 4π to the tenths place to get:
12.6 + 33
→ 45.6
