# angular bisector

## Properties of Triangle

**Side**

Side of a triangle is a line segment that connects two vertices. Triangle has three sides, it is denoted by *a*, *b*, and *c* in the figure below.

**Vertex**

Vertex is the point of intersection of two sides of triangle. The three vertices of the triangle are denoted by *A*, *B*, and *C* in the figure below. Notice that the opposite of vertex *A* is side *a*, opposite to vertex *B* is side *B*, and opposite to vertex *C* is side *c*.