1. 13-1B Solving a Rt Triangle & Angles of Elevation & Depression
Alg. II

2. Solving a Triangle -Find 3 missing parts, angle & side lengths
Ex. 1) Given A = 35 degrees , c = 16

3. Vocabulary
Angle of Depression and Angle of Elevation are Equal by AIA Thm because horizontal lines are ll.
Horizontal Line
Angle of Depression
Angle of Elevation
Horizontal Line

4. Identifying Angles of Elevation and Depression

5. #2 Real-World Connection
You sight a rock climber on a cliff at a 32o angle of elevation. The horizontal ground distance to the cliff is 1000 ft. Find the line of sight distance to the rock climber. x
1000 ft

6. #3 Real-World Connection
An airplane pilots sights a life raft at a 26o angle of depression. The airplane’s altitude is 3 km. What is the airplane’s surface distance d from the raft?
3 km d

7. #4 Real World Connection
You are standing at the end of the shadow of a giant sequoia, 150 ft from its base. The angle of elevation to the sun is 63 degrees. How tall is the tree?