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Formula Right Circular Frustum Lateral area   

Formula
Formula: Right Circular Frustum
Frustum of a Right Circular Cone

Lateral area

Unit
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

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

Radius of the base

Unit
Radius of the lower circular plane.

Radius of the top

Unit
Radius of the upper circular plane.

Pi

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