A = pi r2 = 2 x aprox 3.141593 x 122 = 904.8 square inches C = 2 x pi x r = 2 x aprox 3.141593 x 12 in = aprox 75.4 inches
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Circumference = 2*pi*radius or diameter*pi
The circumference of a circle is calculated using the formula C = πd, where C is the circumference, π is a mathematical constant approximately equal to 3.14159, and d is the diameter of the circle. In this case, the diameter of the circle is 24 inches. Therefore, the circumference of a 24-inch round circle would be C = π * 24 = 75.398 inches.
Well, darling, if a circle has a circumference of 24 inches, we can use the formula C = 2πr to find the radius. Just plug in 24 for C and solve for r. You'll find that the radius of this sassy circle is 3.82 inches.
If a circle has a diameter of 24 inches its circumference is: 75.4 inches (diameter x Pi = circumference).
Diameter = 12 inches, Circumference = 12*(pi) = approx. 37.699 Radius = 12 inches, Circumference = 2*12*(pi) = 24*(pi) = approx. 75.398 inches If the author has actually measured the outside of the circle (i.e. the perimeter of a dinner plate), that is the circumference! Problem solved.