"Pi R Squared" refers to the formula for the area of a circle.
A = (pi)r2 (3.1416 times the square of the radius)
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Pi r squared is the formula for the area of a circle. 2 pi r squared is twice that.
(2)(pie)(r)(h) + (2)(pie)(r - squared) = tot area of a cylinder
The formula for the area of a circle is pie r squared therefore if pie r squared = 254.5 r squared = 254.4 divided by pie = 81.009... r = square root of 81.009... = 9.000... = 9 ( correct to the nearest whole number) therefore radius of this circle is 9
the diameter is the length across the circle, the area is pie r squared r is radius, which is half of the diameter
a circle is a round object. since an area is a two dimensional concept not a three dimensional concept like a volume,the area of a circle is squared. GIVEN BY THE FORMULA A=pie x r(radius)squared. pie=3.14159265