The circumference of a circle is 81.64 inches. What is the circle's radius?
C=81.64 in
Use 𝜋 ≈ 3.14 and round your answer to the nearest hundredth.
To find the circle's radius, we can use the formula for the circumference of a circle, which is C = 2πr, where C is the circumference and r is the radius.
In this case, we know the circumference (C) is 81.64 inches. So we can substitute that into the equation:
81.64 = 2πr
Now we need to solve for r. First, divide both sides of the equation by 2π:
r = 81.64 / (2π)
Now we can use the approximation of π being approximately 3.14 to calculate the radius:
r = 81.64 / (2 × 3.14)
r ≈ 81.64 / 6.28
r ≈ 13.01
Rounding to the nearest hundredth, the circle's radius is approximately 13.01 inches.