1/14 and 1/15

EQ: How do we draw angles of elevation and angles of depression? Agenda:  Warm Up/Check Homework  Notes on Angles of Elevation and Depression  Practice Drawings  Cards  Elevation and Descent Word Problems Homework:  Finish Elevation and Descent Word Problems

1. When I hear the word elevation I think ____________________________________________. 2. When I hear the word depression I think ____________________________________________. 3. Find the measure of the missing angle:

 Angle of Elevation: the angle from the line of sight and upwards. Angle of Elevation

 Angle of Depression: the angle from the line of sight and downwards. Angle of Depression

1. A 75  angle of depression from a plane to your house 2. A 60  angle of elevation from you to a bird in the sky 3. A 15  angle of depression from the top of a building to the top of the next building over 4. A 20  angle of elevation from you to the top of “The Pearle” (school bus)

1.A 75  angle of depression from a plane to your house 2.A 60  angle of elevation from you to a bird in the sky

3.A 15  angle of depression from the top of a building to the top of the next building over 4.A 20  angle of elevation to the top of “The Pearle” (school bus)

1. To measure the height of an inaccessible TV tower, a surveyor paces out a base line of 200m and measures the angle of elevation to the top of the tower to be 62°. How high is the tower? (The distance from the surveyor’s eyes to the ground is 2m.)

2. A tourist stands 15m back from the base of a statue and looks up to the top of the statue. If the angle of evaluation is 48°, find the height of the statue. (The distance from the tourists eyes to the ground is 1.5 m)

3. An airplane is flying at a height of 2 miles above the ground. The distance along the ground from the airplane to the airport is 5 miles. What is the angle of depression from the airplane to the airport?

4. A bird sits on top of a lamppost. The angle of depression from the bird to the feet of an observer standing away from the lamppost is 35 . The distance from the bird to the observer is 25 meters. How far off the ground is the bird?