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The area of a circle is given by: pi multiplied by the square of the radius.

So if the radius is 15, the area is 225pi (225 is 15 squared)

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Q: What is the equation to get the area of a circle if you have the radius?
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How do you find the radius of circle with area 144pi?

Equation for the area circle = pi x radius squared If the area is 144pi, then you need to find the square root of 144, which is 12. Therefore, radius = 12


What is the area of a circle if the radius is 9.525?

using the equation Area = pi x radius squared 285.02


What is the standard equation of the circle?

Area of a circle = pi*radius squared Circumference of a circle = 2*pi*radius or diameter*pi


What is the equation for finding area in a circle?

It's radius x radius x pi.


What is the equation to find the Area of a circle?

π×(radius)2http:/www.mathwarehouse.com/geometry/circle/area-of-circle.php


Equation to find the area of a circle?

Area of a circle = (pi) (R2)R = radius of the circle = 1/2 of its diameter


What is the equation of the circle standard form?

Area of a circle = pi*radius squared Circumference of a circle = 2*pi*radius or diameter*pi


Is the radius of a circle a function of its area?

You can certainly express the radius as a function of its area, yes. If the area is known, you can solve the formula for the area of the circle to uniquely get the radius. (The quadratic equation has two solutions; you will of course choose the positive solution for the radius.)


How do you find the circumference if you have the area of a circle?

Area of a circle = 3.14 * r2 Thus, radius, r = root of ( Area of a circle / 3.14 ) --------- equation 1 Circumference of circle = 2 * 3.14 * r Therefore, from (equation 1), Circumference = 2 * 3.14 * root of ( Area of a circle / 3.14 ). In a nutshell, first find the radius and then the circumference.


What is the area of a circle with a radius of 21cm?

A circle with the radius of 21cm would have an area of approximately 1384.74 cm. You would find this by using the equation of pi*(radius^2) = pi*(21^2).


What is The area of a circle depending on the radius. Use the equation A(r) r2 to compute A(7). Round your answer to the nearest hundredth.?

The area of a circle is: pi times radius squared


The area of circle is 1024 pie square meter what is the diameter?

Solve the equation for the area of the circle (area = pi x radius2) for radius. Multiply the radius by 2 to obtain the diameter.