Question

How do you find the area of a circle? How do you find the circumference of a circle? What information do you need in order to find the area or circumference of a circle? To determine the number of full rotations your tires complete before you need to switch the front and back tires, will you be working with area or circumference?

Answer 1

To find the area of a circle, the formula is
`\pi`r².
To find the circumference of a circle, 2
`\pi`r

You need the radius, or if it's not mentioned, you divide the diameter by 2 and that's the radius.

Answer 2

How do you find the circumference of a circle? The circumference of a circle can be found by multiplying pi (3.14) by the diameter of the circle. What information do you need in order to find the area or circumference of a circle? You need to know the radius of a circle to find the area.