Calculating Angles with Trig Functions
Grade 10th Grade · Math · 45 min
What's Included
Learning Objective
I can calculate the measure of an angle in a right triangle using sine, cosine, or tangent.
Warm-Up Video
Khan Academy · 9:17
Basic trigonometry | Basic trigonometry | Trigonometry | Khan Academy
Guided Notes
3 key concepts
- 1
Trigonometry is the study of the ratios of sides of triangles.
- 2
The mnemonic SOH CAH TOA is helpful for remembering that Sine = Opposite/Hypotenuse, Cosine = Adjacent/Hypotenuse, and Tangent = Opposite/Adjacent.
- 3
The hypotenuse is the side opposite the right angle in a right triangle and is always the longest side.
Practice Questions
8 questions · Multiple choice & Short answer
Exit Ticket
Quick comprehension check
“In a right triangle, the side opposite angle θ is 8 cm and the adjacent side is 15 cm. What is the measure of angle θ in degrees?”
Complete Lesson Package
Get all 3 ready-to-use resources:
