1. 8-4 Angles of Elevation and Depression Objective: To use angles of elevation and depression to solve problems Essential Understanding : You can use the angles of elevation and depression as the acute angles of right triangles formed by a horizontal distance and a vertical height.

2. This angle is the angle of elevation.

3. What is the description of the angle as it relates to the situation shown? The angle of depression from the bird to the person in the hot-air balloon. 3 < The angle of elevation from the base of the mountain to the person in the hot-air balloon. < Angle of elevation from the person in the hot-air balloon to the bird. 2 4 < Angle of depression from the person in the hot-air balloon to the base of the mountain. < 1

4. What is the description of each angle as it relates to the diagram? 5 < < 1 2 < 3 < 4 < Angle of elevation from C to A Angle of depression from A to C Angle of elevation from A to D Angle of elevation from A to B Angle of depression from B to A p. 519: 9-21 odd (skip 19), Mid Chapter Quiz p.514:1-20 (skip 16)