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what is the formula for a circles area. Perimeter of the segment th p r 180 2r sin th2. It is equal to half the diameter.
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Here the Greek letter p represents the constant ratio of the circumference of any circle to its diameter approximately equal to 314159. C 2 p r. Area of the segment th 360 x p r 2 1 2 x sinth x r 2.
In geometry the area enclosed by a circle of radius r is pr2.
If a tile artist is placing tiles in a circular mosaic pattern and the area of the circle is 658 square feet what is the approximate radius of. Or where is the area and is the radius. To find the area using the radius or the length from the center of the circle to the edge use the formula area pr2 where r is the radius. The formula to calculate the area of a circle is.
