# Apothem Definition

In geometry, **apothem **is defined as the **distance between the midpoint** or **central point** **to any regular side of polygons**. In other words, a **straight line** from a **midpoint of the regular polygon perpendicular to any of its sides** is known as **apothem**.

Equivalently, "apothem" is the line stretched from the polygon’s center to one of its perpendicular sides. However, the only polygons with apothems are regular polygons.

To see one of the example of the apothem, check out the diagram listed below:

**Note:**

To know about asymmetry, you can use our Asymmetry Definition.