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Earn +20 ptsQ: Formula of circle
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Continue Learning about Geometry
What is the formula for the circumference of a circle from the area?
In order to convert the area of a circle to the circumference of the circle, divide by the radius and multiply by two. The formula for the circumference of a circle is pi times the diameter.
Formula to find the area of circle?
Area of a circle = pi*radius2
What is the formula to find a radius of a half circle?
same as for a whole circle
Why would you use a formula to determine the circumference of a circle?
There is a constant relationship between the radius of a circle and its circumference. This is expressed in a formula.
What is the formula for finding the area of a semi-circle in terms of pi?
semi means half A semi-circle is half a circle The formula for the area of a circle is A = (Π * r^2) Area of semi circle = (Π * r^2) ÷ 2
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