Question

Find the radius of a circle if the circumference is 66cm​

Answer 1

Answer:

Approximately 10.5, or 10.5095541.

Step-by-step explanation:

To find the radius given the circumference of a circle, we first have to divide the circumference by pi, or an estimation of 3.14. This will give us the diameter.

Since we know that the radius of a circle is simply half the diameter, we divide the number we got from the problem above by 2. This will give you your answer!

Answer 2

Answer:

r = 10.50

Step-by-step explanation:

Circumference =

$2\pi \: r$

$66 = 2\pi \: r$

$\frac{66}{2\pi} = r$

r = 10.5