If the circumference of a circle is 319 meters, find the diameter

The formula for the circumference of a circle is:

C = 2 (π) (r)

Here, you are given 319 as the C, so plug that into the equation.

319 = 2 (π) (r)

Now solve. Divide both sides by 2π.

159.5/π = r

50.8 = r

The radius is half the diameter, so to find the diameter, jusy multiply the radius by 2.

50.8 * 2 = 101.6

d = 101.6

The diameter of the circle is 101.6.

When I did all the math I got 101.5408. I didn't know where to round.