Frustum of a regular pyramid is a portion of right regular pyramid included between the base and a section parallel to the base.
Properties of a Frustum of Regular Pyramid
Elements of a Frustum of Regular Pyramid
a = upper base edge
b = lower base edge
e = lateral edge
h = altitude
L = slant height
A1 = area of lower base
A2 = area of upper base
n = number of lower base edges
Formulas for Frustum of a Regular Pyramid
Volume
See the derivation of formula for volume of a frustum.
Lateral Area, AL
The lateral area of frustum of regular pyramid is equal to one-half the sum of the perimeters of the bases multiplied by the slant height.
The relationship between slant height L, lower base edge b, upper base edge a, and lateral edge e, of the frustum of regular pyramid is given by