Study guides

☆☆

Q: What does the formula Pi r2 mean?

Write your answer...

Submit

Still have questions?

Continue Learning about Geometry

That would depend if you mean 2 times the radius times pi (2*pi*r) or the more likely scenario pi times radius squared (pi*r2). 2*pi*r is the formula of the circumference of a 2d circle. Pi*r2 is the formula of the area of a 2d circle.

The formula for the volume of a cylinder, which is h(pi)r2, is the area of the base (pi)r2 multiplied by the height (h). If you are given the diameter instead, remember that the diameter is twice the radius.So if we know that V = h(pi)r2, we can rearrange the formula in order to find the height.Divide the whole equation by (pi)r2. The result is: V Ã· (pi)r2 = h OR h = V Ã· (pi)r2.The formula h = V Ã· (pi)r2 means the height (h) is equal to the volume (V) divided by the area of the base (pi)r2.

If you mean a circle, use the formula for the area of a circle: A = pi x r2.

The formula for volume of a cylinder is (pi *r2 )h

Area = Pi*r2 = Pi*502 = approximately 7,853.98 units2

Related questions

That would depend if you mean 2 times the radius times pi (2*pi*r) or the more likely scenario pi times radius squared (pi*r2). 2*pi*r is the formula of the circumference of a 2d circle. Pi*r2 is the formula of the area of a 2d circle.

The area of a circle = pi*r2

The formula for the volume of a cylinder, which is h(pi)r2, is the area of the base (pi)r2 multiplied by the height (h). If you are given the diameter instead, remember that the diameter is twice the radius.So if we know that V = h(pi)r2, we can rearrange the formula in order to find the height.Divide the whole equation by (pi)r2. The result is: V Ã· (pi)r2 = h OR h = V Ã· (pi)r2.The formula h = V Ã· (pi)r2 means the height (h) is equal to the volume (V) divided by the area of the base (pi)r2.

the formula for the area of a circle is (pi)r2 (pi)r2=28m 28/pi = 28/pi r2 = 28/pi r= (28/pi)1/2 the formula for circumference is c=2(pi)r c = 2(pi)(28/pi)1/2 c = 18.7578884...m

pi r2

A = 4*pi*r2

The surface area of a whole sphere, of radius r, is 4*pi*r2.The area of the curved surface of a hemisphere is, therefore, 2*pi*r2.The area of the flat surface is that of a circle of radius r, that is = pi*r2.So the total surface area of a hemisphere is 2*pi*r2 + pi*r2 = 3*pi*r2.

A circle doesn't have a surface area because it is a 2D object. The area of a circle is = pi r2. if you mean the surface area of a sphere it is = 4 pi r2

You use the formula for surface area divided by the formula for volume and simplify. Surface area of a cylinder= 2 pi r2 + 2 pi r h The volume is pi * r2 * h So the ratio is (2 pi r2 + 2 pi r h)/(pi * r2 * h) All that is left is to simplify by factoring out an r and Pi for example.

If g represents height or length then: pi*r2*g = volume of a cylinder

People also asked