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When finding area of circle in millimeters is Pi still 3.14?
3.14 is always the best 3 digit approximation of pi.
How is the area of a circle calculated?
The formula is the radius of the circle squared (multiplied by itself) times pi, which is a number that goes on forever and never repeats. Some people use 3.1415925, but it is most commonly considered as 3.14 This is most often written πr2 =Area of the circle where r is the radius of the circle. Using 3.14 as an approximation for π, we have Area=3.14 x r2
How do you find the area of a shaded circle and the area of an unshaded circle on that is inside the other circle?
To find the area of the circle pi*radius*squared and subtract the area of the figure inside
Is the circumference and area of a circle the same?
The circumference of a circle is the distance arround the edge of the circle. The area of a circle is how big the inside of the circle is.
How do you find the diamter of a circle if you know the area?
In order to find the diameter of a circle if you have the area is to rearrange the formula for the area of a circle to put diameter as the unknown, like so: PIE*d = Area of a Circle d = (Area of a Circle) / PIE Therefore if the area of your circle is 40cm, 40/PIE = 12.73cm and that's the diameter.
