


Description 



Height of a Triangle: The length of the perpendicular segment from a vertex to the opposite side of a triangle. It is also called the altitude of a triangle. 
In the figure below, the red segments are the heights of the triangle ABC for each respective base.
Examples of Altitudes
The altitude (h) of this triangle is shown in red.
You can find the altitude or the height of a figure by
measuring the segment (h) that is perpendicular to the base and that meets
the opposite vertex (E). This segment h can also
be called the altitude.
Sometimes the altitude will fall outside the figure, as in the
triangle to the right. In this case, you need to extend the base of the figure
so that it intersects the altitude at a right angle.
NonExample of Altitude
In this picture, the green segment is not an altitude of the
triangle since it is not perpedicular to a base (BC) of the triangle. The
altitude is indicated in red.


