Well honey, the circumference of a circle is calculated using the formula C = 2πr, where r is the radius. So, with a radius of 7.5 inches, the circumference would be 2 x π x 7.5, which equals 47.12 inches. So, grab a measuring tape and go flaunt that circle like it's nobody's business!
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The circumference of a circle with a radius of 7.5 inches is about 47.12 inches. (r x 2 x Pi = C)
If the circumference of a circle is 75 inches, the diameter is: about 23.87 inches. (diameter = circumference divided by pi).
The radius of a circle is half of its diameter. If the diameter of the circle is 150 cm, then the radius would be half of that, which is 75 cm. The radius is the distance from the center of the circle to any point on its circumference.
If the circumference of a circle is 75 feet, the diameter will be 23.87 feet. (d = c divided by Pi).
Area of a circle = pi times radius squared
24 inches in diameter? Circumference is pi(d), or in your case a bit over 75 inches.