Introduction to Area of Rectangles

Area of Rectangles

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What is Area?

- Area is the amount of space taken up by a two-dimensional shape.

- You can measure the area of a shape by counting how many unit squares fit within it.

- A unit square has an area of one square unit.

Multiple Choice

What is the area of this rectangle?

• 12

• 10

• 15

• 14

Why is the area 15?

- This rectangle is covered by 15 unit squares.

- So, the area of the rectangle is 15 square units

Finding Area by Multiplying

- You can also find the area of a rectangle by multiplying.

- Each row has 5 unit squares. There are 3 rows of unit squares.

- You can multiply the Length and the Width to find the area.

Multiple Choice

Which equation will help you find the area?

• 5 x 3

• 5 + 5 + 3 + 3

• 3 + 5

• 5 + 3

Area Formula

Length: How long an object is.

Width: The measurement of the side of an object that is normally the shorter side.

If you have the width and the length of a rectangle you can multiply them to get the area

Multiple Choice

Find the area of the rectangle.

• Area = 13

• Area = 26

• Area = 42

• Area = 49

How to find the area

- Multiply the length by the width.

- The length is 7 and the width is 6.

- So, 7 x 6 = 42

- Your area is 42 square units

Drag and Drop

Find the unknown side. Use the area formula.

36 = l x w

36 = l x 6

The unknown is ​

Placeholder

inches.

Drag these tiles and drop them in the correct blank above

6

5

4

7

8

30