If the circumference of a circle is 28 inches the diameter is: 8.913 inches (circumference divided by Pi = diameter).
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The circumference of a circle with a diameter of 28 cm will be pi*28 cm which is approx 88.0 cm
28"
If the area of a circle is about 28 square inches the diameter is: about six inches (5.971).
A ≈ 615.75
The area of a circle with the diameter of 28 inches is: 615.8 square inches OR 4.28 square feet.