The Law of Sines
Grade 9•45 minutes•G.SRT.C.5.c
Learning Objective
I can apply the Law of Sines to find missing angles and sides in non-right triangles.
Practice Questions
This lesson includes 7 practice questions to reinforce learning.
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1. Explain the Law of Sines and how it can be used to find missing angles in a triangle.
2. Given a triangle with angles A = 30°, B = 45°, and side a = 12, calculate the length of side b using the Law of Sines.
3. If a triangle has two angles measuring 40° and 70°, what is the measure of the third angle?
...and 4 more questions
Educational Video
Law of sines | Trig identities and examples | Trigonometry | Khan Academy
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