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first you do 23.5 X 23.5 (square it) which is 552.25. Then you multiply by pi. If your calculator has a pi button, use it, but if not, round to 3.14. 552.25 X 3.14 = 1734.065 If you have a pi button, you should get 1734.94454294496. Because Pi is irrational, even this is rounded. The easier way to use pi is 3.14 because you a most likely not expected to go out 20 decimal places for pi.
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Formula of area of a circle?
Area of a circle = pi*radius2 measured in square units
How do you find the area of a semi-circle in terms of pi?
The area of a full circle is pi x R squared where R = RADIUS The area of a semi circle is half of that, or pi x R squared/2
The formula for the circumference of a circle is what?
Circumference of a circle = diameter*pi or 2*pi*radius
What is the volume of a cylinder 5 inches high with a 1 inch radius?
the volume of a cylinder is (pi)r squared times the height, same as a circle but plus the height so the answer here would be ((pi) x 1) squared x 5. or 5 pi squared
What is the area of a circle with radius of 9?
area of a circle = pi r squared = pi x (9 squared) = 254.47 to 2 decimal places
