Law of Sines and Cosines, Triangle Area Notes and Worksheets for Grades 9th-11th

Looking for a comprehensive resource to teach the Law of Sines and Cosines? These guided notes and worksheets are perfect for helping your students master triangle calculations and area formulas through clear explanations and practical examples!

What’s Included:

✅ Law of Sines

✅ Law of Sines ambiguous case

✅ Law of Cosines

✅ Proving the Law of Sines and Cosines by deriving the formulas

✅ Area of Triangles using Heron’s formula and 1/2absin(C)

✅ Application problems

20 total pages + all answer keys included. Perfect for Algebra 2 and Geometry students in grades 9th-11th!