An altitude is a line segment in a triangle from a vertex to the side opposite that vertex, and perpendicular to that side. So, in order to construct an altitude, first swing an arc from the vertex that is large enough to intersect the opposite side twice.

## What is an altitude in geometry?

An altitude of a triangle is the perpendicular segment from a vertex of a triangle to the opposite side (or the line containing the opposite side).

## What is an example of altitude in geometry?

The orange line that goes through this triangle is the altitude. This is because it touches a vertex of the triangle. It also forms a right angle as it crosses the opposite side, which is called the base.

## What is an example of altitude?

It describes the angle between the horizon and some point in the sky. For example, if a star is directly overhead, its altitude is 90 degrees. If a star has just set or is just about to rise, it is right at the horizon and has an altitude of 0 degrees.

## Is altitude the same as height?

True altitude is the actual elevation above mean sea level. It is indicated altitude corrected for non-standard temperature and pressure. Height is the vertical distance above a reference point, commonly the terrain elevation.