Find the circumference of a circle. Which is 42 ft, to the nearest foot.

Is 42 feet the diameter or the radius or something else?

I am trying to find out how big is my trampoline to order parts. It is 42ft around and I want to what the diameter is.

To find the circumference of a circle, you need to use the formula: C = 2πr, where C represents the circumference, π is a mathematical constant approximately equal to 3.14159, and r is the radius of the circle.

In this case, we are given the circumference of the circle as 42 ft, and we are asked to find the radius.

First, rearrange the formula to solve for the radius:
C = 2πr
Divide both sides of the equation by 2π:
r = C / (2π)

Now, substitute the given circumference value into the equation:
r = 42 ft / (2 * 3.14159)

To find the radius to the nearest foot, we need to calculate the value of r and round it to the nearest whole number:

r = 42 ft / (2 * 3.14159) ≈ 6.686 ft

Rounding to the nearest foot:
The fractional part, 0.686, is closer to 1 than 0, so rounding up gives:
r ≈ 7 ft

Finally, we can find the circumference using the formula:
C = 2πr
C = 2 * 3.14159 * 7 ft
C ≈ 43.982 ft, which, to the nearest foot, is approximately 44 ft.

Therefore, the circumference of the circle, which is approximately 42 ft, to the nearest foot, is 44 ft.