Number and Operations in Base Ten

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Lesson 3

Hands On: Understand Area

Practice

Count unit squares to find the area of each figure.

1. 2.

Area: Area:

3. A shape is covered by 40 unit squares. What is the area of the shape?

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What is the area of the figure at the right?The figure has no gaps or overlaps. So, count the shaded unit squares.

There are 26 unit squares covering, or enclosing, the figure.

So, the area is 26 square units.

21 square units 24 square units

40 square units

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Lesson 3 My Homework�769

Measurement and Data

3.MD.5, 3MD.5a, 3.MD.5b, 3.MD.6, 3.MD.8

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Problem Solving

6. Caitlyn used a rubber band and geoboard to make the rectangle shown. What is the area of the rectangle?

7 . 1 Plan Your Solution A figure can be covered by 28 unit squares, without any gaps or overlaps. What is the area of the figure?

Vocabulary Check

Choose the correct word(s) to complete each sentence. area square units unit square

8. is measured in and represents the number of those needed to cover a figure without overlapping.

9. A square with a side length of one unit is called a

.

4. Draw and shade a rectangle with an area of 30 square units.

5. Draw and shade a different rectangle with an area of 30 square units.

unit square

28 square units

4 square units

square unitsArea

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770�Chapter 13 Perimeter and Area

Vocab

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