Find the circumference of a circle whose area is 452.16 square meters. (Use 3.1416 as the value of π.)
A. 12 meters
B. 75.3984 meters
C. 24 meters
D. 37.6992 meters
I don't know what formula to use for this equation.
4 answers
Oh ok I figured it out,dont want to type out all my work, but the answer that I came up with is B, am I correct?
We need two formulas.
A = pi * r^2
452.16 = 3.1416 * r^2
452.16/3.1416 = r^2
143.92667 = r^2
12 = r
Now you can find the circumference.
C = pi * d
C = 3.14 * (2 * 12)
A = pi * r^2
452.16 = 3.1416 * r^2
452.16/3.1416 = r^2
143.92667 = r^2
12 = r
Now you can find the circumference.
C = pi * d
C = 3.14 * (2 * 12)
Yes, B is correct.
it’s 12
3 answers