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Q: How do you find radius when area is given?

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Area = pi*radius2 So, radius = sqrt(area/pi)

Area of a circle = pi x radius squared, so to get the radius, divide the Area by pi (3.14159), and then find the square root of that

Divide 314 by pi and square root the answer which will give you the radius.

A = pi x radius squared where pi = 3.14

If the circumference or diameter is given then you can find the radius or simply measure the distance from the centre of the circle to the circumference.

Radius = square root of (area/pi) Circumference = 2*pi*radius

The area of a circle is A=Ï€r2, so the radius is r = âˆš(A/Ï€). Divide the area by pi and then take the square root.

If yo have the area of the circle, the square is irrelevant. Radius = sqrt(Area/pi)

Given the radius, r, the area is pi*r^2.If given the diameter d, the radius is d/r so the area is 0.25*pi*d^2If given the circumference, c, the radius is c/(2*pi), so area = 0.25*(c^2)/pi

Half the square root of the square radius equals the circle radius.

With the information given, you cannot. You need the radius or the central angle.

A = pi x radius2

112cm2

a=area p=pi r=radius sqr(a/p)=r

Area of a circle = pi*radius2 Radius = diameter/2

it is square root of the area divided by pi

By using the other information supplied about the circle to calculate either its radius (from which its area can be calculated) or its area (if the circle is similar to another with a given area and some ratio between the two circle is given):If the diameter is given: radius = diameter ÷ 2If the circumference is given: radius = circumference ÷ 2πIf the circle is similar to another circle which has a given area, and the length ratio is given; square the length ratio to get the area ratio and apply to the given area.

Given a sphere of radius r, Surface area = 4{pi}r2 Volume = (4/3){pi}r3

Entire surface area of a cylinder = (2*pi*radius^2)+(circumference*height) If you are given the circumference then radius = circumference/2*pi

Square root (Area/pi) to get the radius Then 2xRadiusxPi= Circumference

The area of a circle is given by the formula A=pi x r2 Where A is the area of the circle, pi is a constant approximately equal to 3.1415, and r is the radius of the circle. So, to find the area of a circle with a radius of 5cm you would first square the radius -- 25 cm2. Then times by pi. So the answer would be 25pi cm2.

2(pi)(r)(h)=the area of the curved surface

Find the circumference of a circle with radius 5 ft.Area of a circle. The area of a circle of radius r is given by the polynomial πr2. Use 3.14 as an approximation for π.

multiple the diameter by 2 to get the radius, then use your equation and go from there

half the diameter and then get the radius times pi and square it