1. Geometry Right Triangles Lesson 3
Trigonometry Intro
Geometry Right Triangles Lesson 3

2. Anticipatory

3. Trigonometry Intro - Notes
The study of triangle measurement

4. Trigonometry Intro - Notes
𝒂 𝒄
𝒃 𝒄
𝒃 𝒄
𝒂 𝒄
𝒂 𝒃
𝒃 𝒂

5. Trigonometry Intro - Notes
C 𝑨 𝑯
T 𝑶 𝑨
opp
adj
opp
hyp
hyp
adj
Angle
Side ratios

6. Class Example 1 Adjacent Opposite Hypotenuse Label O, A, and H.
The adjacent is ALWAYS touching the Given Angle.
Class Example 1
Adjacent
This is the angle you are Given.
Label O, A, and H.
Opposite
The opposite is ALWAYS across from the Given Angle.
Hypotenuse
The hypotenuse is ALWAYS across from the Right Angle.

7. Class Example 2 S 𝑶 𝑯 C 𝑨 𝑯 T 𝑶 𝑨 Adjacent Opposite
Which Trig Ratio could you use to find the missing angle measure?
Given Angle.
Opposite
S 𝑶 𝑯
C 𝑨 𝑯
T 𝑶 𝑨

8. Class Example 3 S 𝑶 𝑯 C 𝑨 𝑯 T 𝑶 𝑨 Hypotenuse Opposite 𝐬𝐢𝐧 𝟕𝟑= 𝒙 𝟏𝟏
Set up a trig equation to solve for x.
Given Angle.
S 𝑶 𝑯
C 𝑨 𝑯
T 𝑶 𝑨
𝐬𝐢𝐧 𝟕𝟑= 𝒙 𝟏𝟏

9. Student Example 1
Label O, A, and H.

10. Student Example 2 S 𝑶 𝑯 C 𝑨 𝑯 T 𝑶 𝑨
Which Trig Ratio could you use to find the missing angle measure?
S 𝑶 𝑯
C 𝑨 𝑯
T 𝑶 𝑨

11. Student Example 3 S 𝑶 𝑯 C 𝑨 𝑯 T 𝑶 𝑨
Set up a trig equation to solve for x.
S 𝑶 𝑯
C 𝑨 𝑯
T 𝑶 𝑨