**Title:** The Law of Sines

**Description:**
This student reproducible, from an Illuminations lesson, guides students as they use right angle trigonometry to develop the law of sines.

**Standard(s): **

[MA2013] AM1 (9-12) 17: (+) Prove the Law of Sines and the Law of Cosines and use them to solve problems. Understand Law of Sines = 2*r*, where *r* is the radius of the circumscribed circle of the triangle. Apply the Law of Tangents. [G-SRT10] (Alabama)