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lesson 15
1 hour

Classify Quadrilaterals


Description

Objective:  Classify quadrilaterals based on parallel and perpendicular lines and the presence or absence of angles of a specified size.

As the topic progresses into Lesson 15, students explore the definitions of familiar quadrilaterals and reason about their attributes, including angle measure and parallel and perpendicular lines. This work builds on Grade 3 reasoning about the attributes of shapes and lays a foundation for hierarchical classification of two-dimensional figures in Grade 5.

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Credits

From EngageNY.org of the New York State Education Department. Grade 4 Mathematics Module 4, Topic D, Lesson 15. Available from engageny.org/resource/grade-4-mathematics-module-4-topic-d-lesson-15; accessed 2015-05-29.
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