To find the circumference of a circle using the formula C = 2πr, we first need to determine the radius of the circle. The radius (r) is half of the diameter. Since the diameter is 28 inches, we can find the radius as follows:
r = diameter / 2 = 28 inches / 2 = 14 inches
Now that we have the radius, we can plug it into the formula:
C = 2πr = 2π(14 inches)
This simplifies to:
C = 28π inches
Using the approximate value of π (Pi) as 3.14, we can calculate:
C ≈ 28 × 3.14 ≈ 87.92 inches
Therefore, the circumference of the circle with a diameter of 28 inches is approximately 87.92 inches.