Formula: Right Circular Frustum Lateral area   

Formula: Right Circular Frustum
Frustum of a Right Circular Cone

Lateral area

It is the area of the lateral surface of a right circular frustum. That means: The area of the top and base are not counted.

Side length

Side length of a right circular frustum (see illustration).

Radius of the base

Radius of the lower circular plane.

Radius of the top

Radius of the upper circular plane.


Pi is a mathematical constant and has the value \( \pi ~=~ 3.1415926... \)

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