Slant Height

Slant Height of a Cone

The slant height is the distance from any point on the circumference to the apex of the cone.

Cone

By applying the Pythagorean theorem, the slant height of the cone is equal to:

Slant Height Formula

Slant Height Formula

Slant Height of a Truncated Cone

Components of a Truncated Cone

The slant height is the shortest possible distance between the edges of the two bases.

The slant height of the truncated cone is obtained by applying the Pythagorean theorem for the shaded triangle:

Slant Height of a Truncated Cone Formula

Slant Height of a Truncated Cone Formula