Using the formula C = 2ðr, find the circumference of a circle with diameter of 28 inches
C = pi * d
C = 3.14 * 28
C = 87.92 inches
To find the circumference of a circle using the formula C = 2πr, you need to know the value of the radius (r). Given that the diameter (d) is 28 inches, you can calculate the radius by dividing the diameter by 2.
r = d/2 = 28/2 = 14 inches
Now that you have the value of the radius, you can substitute it in the formula to find the circumference (C):
C = 2πr = 2π(14) = 28π inches
Therefore, the circumference of a circle with a diameter of 28 inches is 28π inches.