1. 10.4(c) Notes: Finding Side Lengths
Date:
10.4(c) Notes: Finding Side Lengths
Lesson Objective: Apply trig ratios to find side lengths.
CCSS: G.SRT.8
You will need: scientific calculator
Real-World App: How high did Yoda jump? Lesson 2

2. Lesson 1: Trig. Ratios
To find a side length of a right triangle using TRIG: 
Label the unknown side x.
Highlight the angle measure given.
Highlight the given side.
Determine if you should use SOH, CAH or TOA.

3. Lesson 1: Trig. Ratios
Find each length. Round to the nearest hundredth.
A. QR B. QP

4. Lesson 1: Trig. Ratios
Find each length. Round to the nearest hundredth.
C. FD D. DE

5. Lesson 2: Problem Solving App.
A. Yoda uses the Force to make a vertical jump in the air. A Jedi trainee walks 15 m from Yoda and looks up. The angle of elevation from the trainee is 58°. How high did Yoda jump in the air?

6. Lesson 2: Problem Solving App.
B. What is slant distance between Yoda and the trainee?

7. Lesson 3: Problem Solving App.
A contractor is building a wheelchair ramp for a doorway that is 1.2 ft above the ground. To meet ADA guidelines, the ramp will make an angle of 4.8° with the ground.

8. Lesson 3: Problem Solving App.
To the nearest hun­dredth of a foot, what is the hori­zontal distance covered by the ramp? Find BC.
1.2’
4.8°

9. Lesson 3: Problem Solving App.
To the nearest hun­dredth of a foot, what is the length of the ramp? Find AC.
1.2’
4.8°