# Unit 4: Module 4: Angle measure and plane figures

## About this unit

"This module introduces points, lines, line segments, rays, and angles, as well as the relationships between them. Students construct, recognize, and define these geometric objects before using their new knowledge and understanding to classify figures and solve problems. With angle measure playing a key role in the work throughout the module, students learn how to create and measure angles, as well as how to create and solve equations to find unknown angle measures. In these problems, where the unknown angle is represented by a letter, students explore both measuring the unknown angle with a protractor and reasoning through the solving of an equation. This connection between the measurement tool and the numerical work lays an important foundation for success with middle-school geometry and algebra. Through decomposition and composition activities, as well as an exploration of symmetry, students recognize specific attributes present in two-dimensional figures. They further develop their understanding of these attributes as they classify two-dimensional figures." Eureka Math/EngageNY (c) 2015 GreatMinds.org

### Learn

### Practice

- Identify points, lines, line segments, rays, and anglesGet 5 of 7 questions to level up!
- Angle basicsGet 3 of 4 questions to level up!
- Estimate angle measuresGet 5 of 7 questions to level up!
- Name anglesGet 3 of 4 questions to level up!
- Types of angles by measureGet 3 of 4 questions to level up!
- Recognize angles in figuresGet 3 of 4 questions to level up!
- Angle typesGet 3 of 4 questions to level up!
- Identify parallel and perpendicular linesGet 5 of 7 questions to level up!
- Draw parallel and perpendicular linesGet 3 of 4 questions to level up!

### Learn

### Practice

- Angles in circlesGet 5 of 7 questions to level up!
- Benchmark anglesGet 5 of 7 questions to level up!
- Measure anglesGet 3 of 4 questions to level up!
- Draw anglesGet 5 of 7 questions to level up!

### Practice

- Decompose anglesGet 5 of 7 questions to level up!

### Learn

### Practice

- Identify line symmetryGet 5 of 7 questions to level up!
- Classify triangles by anglesGet 3 of 4 questions to level up!
- Classify triangles by side lengthsGet 3 of 4 questions to level up!
- Classify shapes by line and angle typesGet 3 of 4 questions to level up!
- Classify triangles by both sides and anglesGet 3 of 4 questions to level up!