Question

What is the exact area of circle. Picture below

Answer 1

\[ A = \pi r^2 \]
r = 9 ft, from picture
So, exact area is just A without approximating pi and instead just writing it as pi.

Answer 2

81 pi

Answer 3

So write 81 sq feet

Answer 4

81pi square feet, since the pi is still there
\[ 81 \pi ~square ~feet \]

Answer 5

what about 28 feet

Answer 6

What about 28 feet?

Answer 7

A centipede has more feet than that.

Answer 8

lol. Use the same circle but instead of 9 feet use 28

Answer 9

Then do the same thing.

Answer 10

Then instead of using r=9, use r=28
\[ A = \pi r^2 \]