Composing and Decomposing Polygons using Tetrominoes
Videos to help Grade 3 students learn how to reason about composing and decomposing polygons using tetrominoes.
Common Core Standards: 3.G.1
Plans and Worksheets for Grade 3
Plans and Worksheets for all Grades
Lessons for Grade 3
Common Core For Grade 3
New York State Common Core Math Module 7, Grade 3, Lesson 7
Lesson 7 Concept Development
Problem 1: Use tetrominoes to compose polygons.
Problem 2: Use tetrominoes to compose polygons with given areas.
Lesson 7 Homework
1. Color tetrominoes on the grid to create three different rectangles. You may use the same tetromino
more than once.
2. Color tetrominoes on the grid below:
a. To create a square with an area of 16
b. Create at least two different rectangles
each with an area of 24 square units.
You may use the same tetromino more than
3. Explain how you know the rectangles you created in Problem 2(b) have the correct area.
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