Unit 1 Lesson 6. Classifying Polygons. Students . will be able . to: Identify the 2-dimensional shapes based on their properties. Key Vocabulary. Polygons. Triangles. Quadrilaterals. Pentagons and Hexagons. Other Polygons. Classifying Polygons. A . polygon. is a closed plane shape formed by . three or more. line segments. A polygon is said to be .
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