In the elevation view of a right cone, how many true lengths are depicted?

In the elevation view of a right cone, there are typically two true lengths depicted. The true lengths refer to the measurements that accurately represent the actual physical dimensions of the geometric shape without distortion.

For a right cone, when viewed in elevation, you can see the height of the cone, which is one true length, and the radius of the circular base, serving as the second true length. These measurements reflect the actual dimensions of the cone accurately since they represent straight lines parallel or perpendicular to the plane of projection.

In contrast, other lengths that might be visible in the view, such as slant heights or other diagonal measurements, may not represent true lengths due to foreshortening, hence are not included in this count. This reasoning clarifies why the quantity of true lengths in this context is considered to be two.