9.5: Angle of Elevation and Depression

Objective: Use trigonometry to solve application problems.

Standard: Geometry 19.0

Quick Review:3 Trig functions:

Finding sides:

Finding angles:

Ex. 1) Solve for x and y.

32°45

x y

Ex. 2) Solve for x and y.

x°

149

y

Angle of Elevation and DepressionAngles always made with the _________

Ex. 3) An airplane is 500 ft. from the runway and 50 feet off the ground. What is the angle of depression of the plane?

Ex. 4) You are standing 50 ft. from the library. You measure the angle of elevation to be 55°. How tall is the library if you are 5 ft. 10 in. tall?

Ex. 5) The linear distance from Mr. Fjelstrom's room to McDonalds is 2293 ft. How much farther is it to walk to the street and down the road?

2293 ft.

75°

Assignment: - #11 p. 447 #1-18 (all), 31-37 (all)

- Quiz 8.5 on Wed. 2/23

- Chapter 7 Test correction (Due by Friday, 2/25)