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Math · Grade 3 Math · Unit 7
Unit 7: Two-Dimensional Shapes and Perimeter
Students reason about shapes and their attributes, with a focus on quadrilaterals. They solve problems involving the perimeter and area of shapes.
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Unit
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Concept
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Practice
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Advanced
Try more challenging problems.
What this unit covers
A Reason with Shapes · 5 lessons
Goals
- Reason about shapes and their attributes.
Lessons
- What Attributes Do You See?
- Attributes of Triangles and Quadrilaterals
- Attributes that Define Shapes
- Attributes of Rectangles, Rhombuses, and Squares
- Attributes of Other Quadrilaterals
B What Is Perimeter? · 4 lessons
Goals
- Find the perimeter of two-dimensional shapes, including when all or some side lengths are given.
Lessons
- Distance around Shapes
- Same Perimeter, Different Shapes
- Find the Perimeter
- Perimeter Problems
C Expanding on Perimeter · 3 lessons
Goals
- Solve problems involving perimeter and area, in and out of context.
Lessons
- Problem Solving with Perimeter and Area
- Rectangles with the Same Perimeter
- Rectangles with the Same Area
D Design with Perimeter and Area · 3 lessons
Goals
- Apply geometric understanding to solve problems.
Lessons
- Shapes and Play
- Wax Prints
- A Space for Chickens (Optional)
Helpful to know first
The curriculum says this unit builds on these.
Adapted from the Illustrative Mathematics curriculum (v.360), licensed CC BY-NC 4.0. © Illustrative Mathematics.