The Law of Sines
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Objective
I can apply the Law of Sines to find missing angles and sides in non-right triangles.
Part 1 of 3
Warm-up video
Khan Academy · 5:58Vetted channel
We don't generate video — this one is by Khan Academy on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.
Part 2 of 3
Practice
7 questions
Explain the Law of Sines and how it can be used to find missing angles in a triangle.
Given a triangle with angles A = 30°, B = 45°, and side a = 12, calculate the length of side b using the Law of Sines.
Part 3 of 3
Exit ticket
Quick comprehension check
“In triangle ABC, angle A measures 40°, angle B measures 70°, and side a (opposite angle A) is 10 units long. Use the Law of Sines to find the length of side b (opposite angle B). Show all work. In triangle DEF, angle D measures 55°, angle E measures 85°, and side d (opposite angle D) is 15 units long. Use the Law of Sines to find the length of side e (opposite angle E). Show all work.”
Sample answer included in the free materials
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