Question

A 9.0m ladder rest against the side of a wall. The bottom of the ladder is 1.5m from the base of the wall. Determine the measure of the angle between the ladder and the ground.

Answer 1

We know the hypotenuse [9] and the adjacent side [1.5]

 

So.....we can use the cosine inverse to solve this:

 

cos^-1 [ 1.5 / 9 ]  = about 80.4°