Percent Increase and Decrease Quiz
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Area and Law of Sines and Cosines Worksheet | Answer Key
This comprehensive worksheet covers finding the area of triangles using trigonometric formulas along with practice applying both the Law of Sines and Law of Cosines. Students work on calculating areas with SAS information, solving for missing sides and angles in all triangle types, and handling ambiguous cases. Perfect for precalculus or trigonometry students to deepen understanding of triangle applications and problem solving with step-by-step guidance.
8th - 12th
Geometry, PreCalculus
Guided Proof of Law of Cosines
An enrichment activity for advanced classes or students needing a challenge. A two-column proof of the Law of Cosines, using right triangle trigonometry, is provided for the teacher. On the student handout, the steps are present, but out of order. Students are asked to cut the steps out and the re-arrange them into a logical sequence. A teacher could ask for a written or spoken explanation of why the steps work if desired.
9th - 12th
Algebra 2, Geometry, PreCalculus
CCSS
HSG-SRT.B.4
, HSG-SRT.D.10
, HSG-SRT.D.11
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