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### Course: 4th grade (Eureka Math/EngageNY) > Unit 4

Lesson 4: Topic D: Two-dimensional figures and symmetry- Intro to reflective symmetry
- Identifying symmetrical figures
- Identify line symmetry
- Symmetry review
- Classifying triangles by angles
- Classifying triangles
- Worked example: Classifying triangles
- Classify triangles by angles
- Classify triangles by side lengths
- Types of triangles review
- Classifying shapes by line and angles types
- Quadrilateral properties
- Classifying shapes by lines and angles
- Classify shapes by line and angle types
- Polygons review
- Classify triangles by both sides and angles

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