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Law of Sines
CONCEPTS
Law of Sines
• A / sin A = b / sin B = c / sin C (a, b, c are sides, A, B, C are angles)
• Either 2 sides and 1 angle or 2 angles and 1 side is given.
• This can be used on any triangle (not just right triangles)
PRACTICE PROBLEMS
Question 1 Find the side across from the 110° angle (see figure below)?
-- Answer -- 197
Given 2 angles & 1 side => use law of sines
x / sin 110° = 80 / sin 24°, x = 197
ACT PRACTICE PROBLEMS
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