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Unit 7 - Lesson 11 - Grade 3: Illustrative Mathematics

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16 Questions
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Grade 3 Unit 7
Lesson 11: Rectangles with the Same Perimeter
CC BY 2021 Illustrative Mathematics®
Grade 3 Unit 7
Lesson 11: Rectangles with the Same Perimeter
CC BY 2021 Illustrative Mathematics®
Lesson: Rectangles with the Same Perimeter

Number Talk: Multiply to Divide (Warm Up)

Find the value of each expression mentally.
1.

2.

3.

4.

Perimeter of 16 Units

5.

Draw as many different rectangles with a perimeter of 16 units as you can.

6.

Calculate the area of each rectangle you drew. Explain or show your reasoning.

Same Perimeter, Different Area

7.

Draw 2 rectangles with the perimeter of 12 units but different areas.

8.

Draw 2 rectangles with the perimeter of 20 units but different areas.

9.

Draw 2 rectangles with the perimeter of 26 units but different areas.

10.

Draw 2 rectangles with the perimeter of 34 units but different areas.

11.

Draw 2 rectangles with a perimeter you chose but different areas.

12.

Choose 1 or 2 rectangles you want to share and put them on your poster. Try to look for rectangles that are different from what other groups have already placed.

Gallery Walk
13.

As you visit the posters with your partner, discuss something you notice.

14.

As you visit the posters with your partner, discuss something you wonder.

Cool Down: Perimeter of 18
15.

Draw two rectangles that each have a perimeter of 18 units, but different areas.

16.

Explain or show your reasoning.