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lesson 9
1 hour

Decompose Angles


Description

Objective:  Decompose angles using pattern blocks.

In Topic C, students use concrete examples to discover the additive nature of angle measurement. As they work with pattern blocks in Lesson 9, students see that the measures of all of the angles at a point, with no overlaps or gaps, add up to 360°, and they use this fact to find the measure of the pattern blocks’ angles.

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From EngageNY.org of the New York State Education Department. Grade 4 Mathematics Module 4, Topic C, Lesson 9. Available from engageny.org/resource/grade-4-mathematics-module-4-topic-c-lesson-9; accessed 2015-05-29.
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