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What formula is used to find the diameter or radius of a circle when you know the area?

Anonymous

∙ 15y ago

Updated: 11/3/2022

Area = pi*r*r where pi = 3.14159 (approx)
So r2 = A/pi
so r = + sqrt(A/pi) - clearly, the negative square root, giving a negative radius is nonsense.

And then d, if required, is 2*r

Wiki User

∙ 15y ago

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

Area of Circle = pi (radius)2 So , using this formula we can find the radius and also the diameter. Diameter = 2(radius)

What is the formula for the area of a circle with a diameter?

The general formula for the area of a circle is pi times the radius squared. The radius is half the diameter, so the area is pi times half the diameter times half the diameter again.

How do you work out the area of a circle in a square?

The formula for the area of a circle is pi x radius2. The radius is half the diameter, and the diameter of an inscribed circle is the same as the length of a side of the square.The formula for the area of a circle is pi x radius2. The radius is half the diameter, and the diameter of an inscribed circle is the same as the length of a side of the square.The formula for the area of a circle is pi x radius2. The radius is half the diameter, and the diameter of an inscribed circle is the same as the length of a side of the square.The formula for the area of a circle is pi x radius2. The radius is half the diameter, and the diameter of an inscribed circle is the same as the length of a side of the square.

How do you figure the area of a circle if you know the diameter?

The formula for the area of a circle is: area = pi x radius2. The radius is half the diameter.

What is the formula for finding diameter when given the area?

Assuming you mean a circle, use the formula for the area of a circle, which is usually expressed in terms of the radius, and solve for the radius. Then you can multiply that by two to get the diameter, since the diameter is twice the radius.

Related Questions

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

Area of Circle = pi (radius)2 So , using this formula we can find the radius and also the diameter. Diameter = 2(radius)

What is the formula for the area of a circle with a diameter?

The general formula for the area of a circle is pi times the radius squared. The radius is half the diameter, so the area is pi times half the diameter times half the diameter again.

What is the mathematical formula for finding the radius of a circle?

To calculate this you will need the diameter of the circle. The formula is: diameter/2*pi If you don't know the diameter you can also use the area of the circle: Sqrt(Area/pi) = radius

How do you work out the area of a circle in a square?

The formula for the area of a circle is pi x radius2. The radius is half the diameter, and the diameter of an inscribed circle is the same as the length of a side of the square.The formula for the area of a circle is pi x radius2. The radius is half the diameter, and the diameter of an inscribed circle is the same as the length of a side of the square.The formula for the area of a circle is pi x radius2. The radius is half the diameter, and the diameter of an inscribed circle is the same as the length of a side of the square.The formula for the area of a circle is pi x radius2. The radius is half the diameter, and the diameter of an inscribed circle is the same as the length of a side of the square.

What is the formula for a circle radius r?

Area of a circle = pi*radius2 Circumference of a circle = 2*pi*radius or diameter*pi Diameter of a circle = 2*radius

What is the formula for the area of a circle with a diameter of 100?

The formula for the area of a circle is A = πr^2, where A is the area and r is the radius of the circle. To find the radius from the diameter, you divide the diameter by 2. So, for a circle with a diameter of 100, the radius would be 50. Plugging this into the formula, the area would be A = π(50)^2 = 2500π square units.

How do you figure the area of a circle if you know the diameter?

The formula for the area of a circle is: area = pi x radius2. The radius is half the diameter.

What is the area of a circle that has a diameter of 34 ft?

Divide the diameter by 2 to get the radius. Then use the standard formula for the area of a circle.

What is the formula for finding diameter when given the area?

Assuming you mean a circle, use the formula for the area of a circle, which is usually expressed in terms of the radius, and solve for the radius. Then you can multiply that by two to get the diameter, since the diameter is twice the radius.

How do you find a diameter of a circle?

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)

What the formula in circle?

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

What is the formula for area and circumference of a circle?

The formula for the area of a circle is pi * radius squared. The circumference of a circle's formula is pi * diameter. NOTE: pi equals approx. 3.14

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