Examples, solutions, and videos to help Grade 4 students learn how to decompose angles using pattern blocks.
Common Core Standards: 4.MD.7
NYS Math Module 4 Grade 4 Lesson 9 Concept Development
Problem 1: Derive the angle measures of an equilateral triangle.
Place squares around a central point. Fit them like puzzle pieces. Point to the central point. How many right angles meet at this central Point Y?
How many quarter-turns are there around the central point?
Arrange a set of green triangles around a central point. How many triangles did you fit around the central point?
NYS Math Module 4 Grade 4 Lesson 9 Homework
Sketch two different ways to compose the given angles using two or more pattern blocks. Write an addition sentence to show how you composed the given angle.
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