Question

how do you find the area of a circle?

Answer 1

\[\pi r^2\]

Answer 2

what does that mean?

Answer 3

it's the formula.

Answer 4

what do i do if it already gives me the diameter?

Answer 5

what is the diameter?

Answer 6

18

Answer 7

pi=22/7
diameter(d)=2radius(r)
r=18/2
9

Answer 8

to get the area, follow the formula

22/7*9*9

Answer 9

why is 22/7?

Answer 10

22/7*81= 254.57

Answer 11

22/7 is the pi. it represents pi.

Answer 12

so the area is 254.57 unit squared

Answer 13

http://www.mathgoodies.com/lessons/vol2/circle_area.html to learn more

Answer 14

thank you!

Answer 15

oh yes, pi is also known either as 22/7 or 3.14/ 3.142 (depending on your question)

Answer 16

it's all the same. yw.