It's a right triangle. Use the pythagorean theorem. 36^2+r^2=(r+12)^2. r=48.
For number 9 the answer is B

Option ( A ) is the correct answer.
- Sum of all interior angle of a regular pentagon is 540°
- Number of edges in regular pentagon is 5.
- Number of vertices in regular pentagon is 5.
Answer:
64π inches² (approximately 201.06 inches²)
Step-by-step explanation:
where
is the radius
To find the radius, divide the diameter by 2
16 ÷ 2 = 8 inches
Plug in 8 as the radius

(approximately)
Therefore, the area of the circle is 64π inches², or approximately 201.06 inches².
I hope this helps!