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# Solving Triangles Assessment

Lesson 13 of 13

## Objective: SWBAT determine the best method to solve problems involving triangles.

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

*45 minutes*

#### Assessment

*45 min*

The assessment for this unit allows students to demonstrate their understanding of structure, problem solving skills, repeated reasoning and modeling ability.

Instead of just giving students information about some triangles and then spend time working out solutions with a calculator, I ask students to reasons about given information in questions 1-4. These questions ask students to identify the number of possible solutions justify the decision and then write out how to start the problem.

The rest of the problems have students solve problems in context. Question 5 is often missed because the students put the angle in the wrong position they locate the turn as angle ABC not the supplement as and ABC.

For this test the first 7 questions are important to be proficient. The last 2 questions ask students to extend what they have learned so those problems are considered advanced.

#### Resources

*expand content*

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- UNIT 1: Introduction to Learning Mathematics
- UNIT 2: Functions and Piecewise Functions
- UNIT 3: Exponential and Logarithmic functions
- UNIT 4: Matrices
- UNIT 5: Conics
- UNIT 6: Solving Problems Involving Triangles
- UNIT 7: Trigonometry as a Real-Valued Functions
- UNIT 8: Graphing Trigonometric Functions
- UNIT 9: Trigonometric Identities
- UNIT 10: Solving Equations
- UNIT 11: Vectors and Complex Numbers
- UNIT 12: Parametric and Polar graphs and equations

- LESSON 1: Review of Angles
- LESSON 2: Solving Right Triangles
- LESSON 3: Law of Sines Introduction
- LESSON 4: Ambiguous Case Day 1 of 2
- LESSON 5: Ambiguous Case Day 2 of 2
- LESSON 6: Finding the Second Solution
- LESSON 7: Problem Solving with Triangles
- LESSON 8: Law of Cosines Day 1 of 2
- LESSON 9: Law of Cosines Day 2 of 2
- LESSON 10: Area of Triangles
- LESSON 11: Review of Solving Triangles Day 1 of 2
- LESSON 12: Review of Solving Triangles Day 2 of 2
- LESSON 13: Solving Triangles Assessment