Answer:
87.2 cm
Step-by-step explanation:
First, I'd calculate the half circumference of the semi circle provided.
The formula for circumference is c = 2[tex]\pi[/tex]r, or d[tex]\pi[/tex]. Half of it would just be c/2 = r[tex]\pi[/tex]
Since our diameter is 30 cm, our radius is 15 cm.
Circumference = 15[tex]\pi[/tex] ≈ 47.21 cm
The rest of the figure's perimeter is just adding together 10 + 10 +20.
So, 47.21 + 10 + 10 + 20
= 47.21 + 40
= 87.21 cm
Then, you round to the nearest tenth.
I hope this helps!
