# Apothem

Apothem is a line joining the center of the polygon to one of its sides. We can develop a convenient formula for finding the apothem of a regular polygon. Since an n-sided regular polygon is composed of n identical triangles, the formula for the apothem of a regular polygon is found by dividing 2 times the area of polygon by the perimeter of the regular polygon.

**Properties :**

**1)**An apothem of a regular polygon is the perpendicular bisector of the side to which it is drawn.

**2)**An apothem bisects the central angle determined by the side to which it is drawn.