# 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.

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

### Slant Height 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:

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