A circle with a radius of 11 inches has an area of 380.13 square inches.
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Twice its radius which is 11 inches
the area can not be cubed. the area is always squared. volume is cubed. the formula for area is pie multiplied by radius squared. your formula for your circle is... A = 121pi in2 the radius in your circle is 11 inches the formula for circumference is two times pi times the radius C = 2 * (3.14159) * 11 your answer is 69.11498in
Oh, dude, the radius of a circle is just half of the diameter, so for an 11-inch circle, the radius would be 5.5 inches. Like, it's just basic math, nothing to lose sleep over. So yeah, the radius is 5.5 inches, but who's really measuring, right?
The area is 1,520.53 inches2
A cylinder that has a radius of 5 inches and a height of 11 inches has a surface area of 502.65 inches2