Right Triangles
A right triangle can be identified because one of its interior angles has a measure of 90°
In the figure of the problem, the right angle is marked in the vertex B of the triangle.
Since the sum of all the interior angles of a triangle is 180°, and we already have the right angle (90°) and the measure of angle A, we can find the angle c as follows:
c = 180° - 90° - 66° = 24°
Angle of elevation = 24°
