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Unit 2 - Lesson 9 - Grade 3: Illustrative Mathematics

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Grade 3 Unit 2
Lesson 9: Measure to Find the Area
CC BY 2021 Illustrative Mathematics®
Grade 3 Unit 2
Lesson 9: Measure to Find the Area
CC BY 2021 Illustrative Mathematics®
Lesson: Measure to Find the Area

Notice and Wonder: Groups and Arrays (Warm Up)

What do you notice?

What do you wonder?

Measure to Find Area

Use a ruler to measure the rectangles. Then, calculate the area of the rectangles in square centimeters.

Calculate the area of the rectangle in square centimeters.

_______square centimeters
Calculate the area of the rectangle in square centimeters.

_______square centimeters
Calculate the area of the rectangle in square centimeters.

_______square centimeters

Create a Rectangle

Your teacher will give you some tape. Use it to create a rectangle with your assigned area.

Area 1: 4 square feet

Area 2: 6 square feet

Area 3: 9 square feet

Area 4: 10 square feet

Area 5: 12 square feet

Area 6: 16 square feet

Cool Down: Find the Area

Use your ruler to find the area of the rectangle in square inches.