1. 7.5 Angles of Elevation and Depression What you’ll learn: 1.To solve problems involving the angles of elevation 2.To solve problems involving the angles of depression.

2. Angle of Elevation The angle of elevation – the angle between the line of sight and the horizontal when an observer looks up to an object above. Angle of Elevation

3. Angle of Depression The Angle of Depression is the angle between the line of sight and the horizontal when the observer looks down at some object below. Angle of Depression

4. Example A wheelchair ramp is 3 meters long and inclines at 6 . Find the height of the ramp to the nearest tenth centimeter.

5. Bob is on the top deck of a cruise ship and observes two dolphins following each other directly away from the ship in a straight line. Vernon’s position is 154 meters above sea level, and the angles of depression to the two dolphins are 35  and 36 . Find the distance between the 2 dolphins to the nearest meter.

6. Homework p. 374 8-18 all