Q: What is pie R squared used for?

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its 2 pie r squared BUT you have to add back the base (a circle) which is pie r2 The original formula is 4 pie r squared Your new formula is (2 pie r squared + pie r squared)

radius

Area of a circle = pi*radius2

It isn't. That is the formula for the AREA of a circle!

PIE r squared 3.142 X 42 = 50.24

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its 2 pie r squared BUT you have to add back the base (a circle) which is pie r2 The original formula is 4 pie r squared Your new formula is (2 pie r squared + pie r squared)

radius

pie r squared

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

As in pie r squared? r = radius.

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

Area of a circle = pi*radius2

"Pi R Squared" refers to the formula for the area of a circle. A = (pi)r2 (3.1416 times the square of the radius)

It isn't. That is the formula for the AREA of a circle!

Area of circle = pie x (r squared) = πr^2 r = radius π = pie = 22/7 or 3.142

PIE r squared 3.142 X 42 = 50.24