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Unit 7 - Lesson 8 - Grade 3: Illustrative Mathematics

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Last updated 2 months ago
16 Questions
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Grade 3 Unit 7
Lesson 8: Find the Perimeter
CC BY 2021 Illustrative Mathematics®
Grade 3 Unit 7
Lesson 8: Find the Perimeter
CC BY 2021 Illustrative Mathematics®
Lesson: Find the Perimeter

Number Talk: Decreasing Dividend (Warm Up)

Find the value of each expression mentally.
1.

2.

3.

4.

Ways to Find Perimeter

5.

What do you notice?

6.

What do you wonder?

7.

Find the perimeter of the shape. Explain or show your reasoning.

8.

Find the perimeter of the shape. Explain or show your reasoning.

9.

Find the perimeter of the shape. Explain or show your reasoning.

10.

Find the perimeter of the shape. Explain or show your reasoning.

11.

Find the perimeter of the shape. Explain or show your reasoning.

Something is Missing

12.

Find the perimeter of this rectangle. Explain or show your reasoning.

13.

All the short sides of this figure are the same length, and all the angles are right angles. Find the perimeter. Explain or show your reasoning.

14.

All the sides of the octagon are the same length. Find the perimeter. Explain or show your reasoning.

Cool Down: A Triangle and a Square
15.

Find the perimeter of the shape. Explain or show your reasoning.

16.

Find the perimeter of the shape. Explain or show your reasoning.