# Triangle

A **triangle** is one of the basic shapes of geometry: a polygon with **three** corners orvertices and **three** sides or edges which are line segments. A triangle with vertices *A*, *B*, and *C* is denoted .

In Euclidean geometry any three points, when non-collinear, determine a unique triangle and a unique plane (i.e. a two-dimensional Euclidean space).

## Area of a Triangle – Math pictures

**Area of a Triangle**

**Area of a Triangle**

**Area of a Triangle**

**Area of a Triangle**