The formula for the circumference of a circle is C = 2πr, where C is the circumference, r is the radius, and π is pi (approximately 3.14).
In this problem, we are given that the circumference is 36 cm. So we can set up the equation:
36 = 2πr
To solve for r, we need to isolate it on one side of the equation. We can do this by dividing both sides of the equation by 2π:
36 / 2π = r
r ≈ 5.7
So the radius of the circle is approximately 5.7 cm.