## Apothem of regular polygons

If you want to find the **area of regular polygons**, you will need a new element: the **apothem**.

Regular polygons have equal sides and angles. If you **connect the vertexes of the sides to the centre of the polygon**, you will have as many **equal isosceles triangles** as the sides of the polygon.

The apothem is the line connecting the centre of the polygon to the midpoint of one of the polygon's sides. So, the apothem **is the height of every little triangle**. There is a **connection between the apothem and the polygon's side**: the fixed number.

When you divide the apothem of a square by the length of its side, the result is always 0,5!