Question

An arborist sights the top of a tree using a clinometer and reads the angle of elevation to e 290. Her clinometer is 28 metres from the base of the tree. Find the angle between tree and the ray

i want the answer quickly

Answer 1

Answer:

Step-by-step explanation:

1) Find a place to stand where you can see the top of  

the tree. The distance away from the tree should be at  

least equal to the height of the tree.

2) Measure the distance to the tree and the height that  

the clinometer will be from the ground.

3) Look through the clinometer with one eye and at the  

tree with the other eye (this takes a bit of getting used  

to). Line up the crosshair in the clinometer with the top  

of the tree.

4) Read the number on the percent scale. This gives  

you the tree's height as a percentage of the distance  

from the tree. Eg. If it reads 50% the height of the tree  

is half the distance you are from the tree.

5) Calculate the height of the tree using the equation:

Tree height = clinometer reading/100 x distance to  

tree + distance of clinometer from the ground

Example:

Distance to tree = 36m

Percent scale reads 75

Height from the ground = 1.8m

Tree height = 75/100 x 36 +1.8 = 28.8m

36m

1.8