Plans and Worksheets for Grade 4
Plans and Worksheets for all Grades
Lessons for Grade 4
Common Core For Grade 4
Examples, solutions, and videos to help Grade 4 students learn how to decompose angles using pattern blocks.
Common Core Standards: 4.MD.7
New York State Common Core Math Grade 4, Module 4, Lesson 9
Download worksheets for Grade 4, Module 4, Lesson 9
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.
1. is a straight line.
2. ∠DEF = 90°
3. ∠GHI = 120°
4. x° = 270°
5. Micah built the following shape with his pattern blocks. Write an addition sentence for each angle
indicated by an arc and solve. The first one is done for you as an example.
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