The formula for the area of a circle is

We know the diameter, and the radius is half of the diameter. So the radius is 9. Now we plug that into the formula.

So the answer is B, 81 pi square feet
Answer:
15 square meters
Step-by-step explanation:
when it says find the area you have to add all the lengths together
It’s 30 because they are vertical angles which means both sides are congruent
18+8/4x2
18+8/8
18+1
PEMAS
parentheses,
Answer:
the answer of the question is C because 1/2=.5