You cannot have a trapezoidal cylinder. That is like a square circle - an impossible shape.
The volume is Base x height; the Base area is the same as the formula for a circle - which is proportional to the square of the radius. For example, if you double the radius (or the diameter, or the circumference) of a circle, its area will quadruple.
If you are given the radius of the circle, you can use the formula: diameter = 2*radius If you are given the circumference of the circle, you can use the formula: diameter = circumference/pi
With great difficulty because a circle does not have volume but it does have an area. Area of a circle = pi*radius2 and measured in square units
The formula of volume
The formula is:Volume of a circle = 0
A circle is two dimensional, it has area but not volume.
The formula that expresses the volume of a circle isV = 0 .A circle is a 2-dimensional (flat) shape, so it has no volume.
There is none because a circle has no volume but the area of a circle is pi*radius^2
A semi-circle is a 2-dimensional figure and so cannot have a volume.
The formula for area of a circle is radius squared times pi. The formula for volume of a cylinder is radius squared times pi times height.
A circle has no volume; it is a 2D shape. If you mean a sphere, then the formula is V = (4/3)πr3 where V is volume, π is pi (~3.14) and r is radius.
Volume of a sphere = 4/3*pi*radius3 Area of a circle = pi*radius2
Technically, a circle is a 2-dimensional object, so the question should read "volume of a sphere" OR "Area of a circle". The formula to work out the volume of a sphere is: 4/3 pi x r3, where "r" is the radius of the sphere. To find the area of a circle: pi x r2.
Wouldn't a circle-based pyramid look a lot like a cone ? If so, you could probably use the formula for the volume of a cone and get away with it.
The formula for working out a cylinder is... pie radius squared times height The pie radius squared works out the area of one of the circle faces, and then multiplying it by the height sort of stretches out the circle face to the cylinder's exact volume
Calculate the base area using the formula for a circle. The calculate the volume with the formula: V = (1/3)Bh