If the diameter is 8 centimeters, the radius is 4. We can use the formula

and plug in r=4 and h=13 to get

, so

.
3(2x+1) you factor it by using the gcf between the two terms which is 3
8-the formula to find an exterior angle of a polygon is:
360/n
(n is the number of sides of the polygon)
so the answer is 40

9 - the formula to find an interior angle of polygon is:

so the answer is 135

good luck
Answer:
14
Step-by-step explanation:
