What is the Median and Altitude of a Triangle A closed figure bounded by three line segments is called a triangle. It is a 3-sided polygon and is named as 'ΔABC'. In the above figure: (a) Number of sides forming ΔABC are 3, i.e., AB, BC, and CA. (b) Number of vertices (i.e., initial and terminal points of sides) are 3, i.e., A, B, and C. (c) Number of angles are 3, i.e., … [Read more...] about What is the Median and Altitude of a Triangle