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Laabri

Unit 7 - Lesson 11 - Grade 3: Illustrative Mathematics

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16 Nsɛmmisa
Hyɛ no nsow a efi ɔkyerɛwfo no hɔ:

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)

Perimeter of 16 Units

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Same Perimeter, Different Area

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Cool Down: Perimeter of 18
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Find the value of each expression mentally.

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1.

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2.

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3.

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4.

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5.

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

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6.

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

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7.

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

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8.

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

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9.

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

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10.

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

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11.

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

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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

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13.

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

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14.

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

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15.

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

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16.

Explain or show your reasoning.