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- HSG-SRT.D.9(+) Derive the formula A = (1/2)ab sin(C) for the area of a triangle by drawing an auxiliary line from a vertex perpendicular to the opposite side.
- HSG-SRT.D.10(+) Prove the Laws of Sines and Cosines and use them to solve problems.
- HSG-SRT.D.11(+) Understand and apply the Law of Sines and the Law of Cosines to find unknown measurements in right and non-right triangles (e.g., surveying problems, resultant forces).

Unit Review Game: Categories

12th Grade Math

Â» Unit:

Additional Trigonometry Topics

Big Idea:The review game Categories is a fun way to review the Law of Sines, Law of Cosines, vectors, and complex numbers.

Formative Assessment: Formulas and Vectors

12th Grade Math

Â» Unit:

Additional Trigonometry Topics

Big Idea:Use Math Graffiti to review for today's quiz.

Trigonometry from a Geometric Perspective

12th Grade Math

Â» Unit:

Additional Trigonometry Topics

Big Idea:Use the Law of Sines, Law of Cosines, SAS Area Formula, and SOH CAH TOA to solve problems involving triangles.

Area of Triangles

12th Grade Math

Â» Unit:

Solving Problems Involving Triangles

Big Idea:Why does (1/2)*a*b*sin(C) give the area of a triangle?

The Law of Sines: More than Meets the Eye

12th Grade Math

Â» Unit:

Additional Trigonometry Topics

Big Idea:Using the Law of Sines will throw your students for a loop - there are two possible answers!

Unit Review: Additional Trigonometry Topics

12th Grade Math

Â» Unit:

Additional Trigonometry Topics

Big Idea:Give your students time to grapple with the important concepts of this unit.

Solving Triangles Assessment

12th Grade Math

Â» Unit:

Solving Problems Involving Triangles

Big Idea:Students will demonstrate their understanding of Law of Sines, Law of Cosines, and right triangles through an assessment.

SAS Area Formula

Geometry

Â» Unit:

Right Triangles and Trigonometry

Big Idea:Batteries not included...but the angle must be. Some assembly required. In this lesson students build a new triangle area formula and learn when and how to apply it.

Review of Solving Triangles Day 2 of 2

12th Grade Math

Â» Unit:

Solving Problems Involving Triangles

Big Idea:By sharing individual examples students will review for an assessment on solving problems involving triangles.

Review of Solving Triangles Day 1 of 2

12th Grade Math

Â» Unit:

Solving Problems Involving Triangles

Big Idea:By creating problems for others to solve, students will review solving triangles using multiple methods.

Review for Trigonometry Unit Assessment

Geometry

Â» Unit:

Triangle Similarity and Trigonometric Ratios

Big Idea:In this review lesson, students will apply their understanding of triangle similarity and trigonometry to write proofs.

HSG-SRT.D.9

(+) Derive the formula A = (1/2)ab sin(C) for the area of a triangle by drawing an auxiliary line from a vertex perpendicular to the opposite side.

HSG-SRT.D.10

(+) Prove the Laws of Sines and Cosines and use them to solve problems.

HSG-SRT.D.11

(+) Understand and apply the Law of Sines and the Law of Cosines to find unknown measurements in right and non-right triangles (e.g., surveying problems, resultant forces).