Unit 7, Lesson 4
Solving for Unknown Angles
Grade 7
Preparation
Lesson Narrative
In previous lessons, students solved single-step problems about supplementary, complementary, and vertical angles. In this lesson, students apply these skills to find unknown angle measures in multi-step problems. In the Information Gap activity, students ask questions about the angle relationships and solve for missing measures in a diagram. Then they see that they can represent angle problems with equations. Students also work to construct arguments about angles and discuss them with their partners (MP3).
- Coordinate (orally and in writing) diagrams and equations that represent the same relationship between angle measures.
- Solve multi-step problems involving complementary, supplementary, and vertical angles, and explain (orally) the reasoning.
Let’s figure out some missing angles.
Required Materials
Activity 2
Required Preparation
None