How many true lengths are depicted in the elevation view of a right cone?

In an elevation view of a right cone, there are two true lengths represented. The true lengths are the measurements that accurately reflect the actual dimensions of the cone in a way that would remain unchanged regardless of the angle from which they are viewed.

The first true length is the vertical height from the base to the apex of the cone. This height provides a precise measurement of how tall the cone is. The second true length relates to the diameter or radius of the base when represented at the point where the base intersects with the vertical height. This diameter gives a direct measure of the width of the cone at its base.

Understanding these true lengths is crucial because they help in accurately visualizing and constructing the cone in physical or digital formats. In contrast, other lengths may appear distorted due to perspective in certain views, making it essential to focus on the two specific lengths that remain constant in the elevation view.