To calculate the circumference of a circle using the diameter given, we start with the formula for circumference:
C = 2πr
Where C is the circumference and r is the radius of the circle. The radius is half of the diameter, so if the diameter is 28 inches, we first need to find the radius:
r = diameter / 2
r = 28 inches / 2 = 14 inches
Now we can plug the radius back into the circumference formula:
C = 2π(14)
Using the approximation π ≈ 3.14, we can calculate:
C ≈ 2 × 3.14 × 14
C ≈ 6.28 × 14
C ≈ 87.92 inches
Finally, rounding to the nearest inch gives us:
C ≈ 88 inches
So, the circumference of a circle with a diameter of 28 inches is approximately 88 inches.