Question

The
height of a tree can be mesyred by​

Answer 1

Explanation:

Many clinometers and Abney levels have a percent-grade scale that gives 100 times the tangent of the angle. This scale gives the tree height in feet directly when measured at a distance of 100 feet (30 m) from the tree. The same process is used to measure the height of the base of the tree above or below eye level.