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Area of Circle = pi (radius)2

So , using this formula we can find the radius and also the diameter.

Diameter = 2(radius)

Q: How do you find the radius and diameter of the circle if you know the area?

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By dividing its diameter by 2 is equal to the radius of a circle and its area is pi*radius2

The area of a circle is pi(radius)2 Radius is half the diameter. Simply divide the diameter in half and enter it into the equation 3.14(diameter/2)2

If: pi*radius2 = area Then: radius = square root of (area/pi) And: diameter = 2*radius

Alike: Their in the formula to find the area of the circle pie times radius squared or pie times diameter divided by 2 Different: In a circle, radius is half of the diameter. Example: If the diameter of a circle is 10. Then the radius would be 5.

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

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If you have the circumference: circumference = (pi) * diameter diameter = circumference / (pi) If you have the area: area = (pi) * radius * radius radius = square_root(area / pi) radius = diameter / 2 diameter = 2 * square_root(area / pi)

All you have to do is multiply the radius by 2.

pi*radius2 = area of a circle radius2 = area/pi radius = square root of (area/pi) diameter = 2*radius

By dividing its diameter by 2 is equal to the radius of a circle and its area is pi*radius2

Since the area of a circle is (Pi)times(Radius squared) then you would reverse the process to find the radius, and hence, the diameter. Divide the area by Pi (3.14159...) and you would have the radius squared. Take the square root of that and you have the radius. To get the diameter, multiply the radius by 2.

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

The area of a circle is pi(radius)2 Radius is half the diameter. Simply divide the diameter in half and enter it into the equation 3.14(diameter/2)2

To find the circumference of a circle then multiply pi (3.14159265...) by the diameter of the circle. To find the area then multiply pi by the radius squared.

In this case, the radius is easiest calculated from the diameter. The radius is simply half the diameter.

Area = Pi(radius)squared. You only need the radius of a circle to find the area. To find the radius, when you have the diameter, divide the diameter by 2, because the diameter forms two radii. After you have found the radius, plug in the radius into the area equation: Area = Pi(radius)squared In other words, you can say the other equation for the area of a circle is: Area = Pi(1/2Diameter)squared

If: pi*radius2 = area Then: radius = square root of (area/pi) And: diameter = 2*radius

To find the area of a circle, here is the formula: A=Pi r2 To find area, you must square the radius and multiply it by pi. If it gives you the diameter, not the radius, divide the diameter by 2, that gives you the radius, then square it and multiply by pi.