## apothem

ap·o·themMath. the perpendicular from the center of a regular polygon to any one of its sides

Origin of apothem

Modern Latin from apo- + Classical Greek*thema*, that which is placed: see theme

## apothem

noun

The perpendicular distance from the center of a regular polygon to any of its sides.

Origin of apothem

**apo-**Greek

*thema*

*something laid down*; see

**theme**.

## apothem

Noun

(*plural* apothems)

- (geometry) The perpendicular distance from the center of a circle to a chord of the same circle.
- (geometry) The distance from the center of a regular polygon perpendicular to one of its sides (a special case of the above).

Origin

From Ancient Greek *ἀπόθεμα* (apothema, “deposit”), from *ἀπό* (apo, “off, away”) + *θέμα* (thema, “that which is laid down”).