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Math Worksheets

Lessons for Third Grade

Free Printable Worksheets

In these free math worksheets, you will practice how to calculate the area of rectangles and how to find unknown lengths. You can also practice solving perimeter word problems. You can either print the worksheets (pdf) or practice online.

**How to find the area of a rectangle?**

The area of a rectangle can be calculated by multiplying its length by its width. The formula for the area of a rectangle is:

Area = length x width

or

A = l x w

where “A” represents the area, “l” represents the length, and “w” represents the width.

For example, if a rectangle has a length of 5 units and a width of 3 units, then its area can be calculated as:

A = 5 x 3 = 15 square units

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

**How to find an unknown side?**

You can use division to find the unknown side length of a rectangle when given the area and a side.

For example, if a rectangle has a width of 3 units and an area of 15 square units, then the length of its unknown side is:

15 ÷ 3 = 5 units

So, the length of the rectangle is 5 units.

Have a look at this video if you need to learn how to find the perimeter of a shape.

Click on the following worksheet to get a printable pdf document.

Scroll down the page for more **Area of Rectangle Worksheets**.

**Printable**

Area of Rectangle Worksheet #1

(Answers on the second page.)

Area of Rectangle Worksheet #2

(Answers on the second page.)

**Area of Rectangle Word Problems**

- Ursa draws a rectangle that has side lengths of 9 centimeters and 6 centimeters. What is the area of the rectangle?
- Alice’s rectangular garden is 20 meters long and 15 meters wide. What is the area of the garden?
- Patricia draws a rectangle that has side lengths of 4 centimeters and 9 centimeters. What is the area of the rectangle?
- Paul’s picture frame is 14 inches long and 10 inches wide. What is the area of the picture frame?
- What is the area of a rectangular piece of paper that is 12 inches long and 8 inches wide?
- James bought a rectangular table that is 6 feet long and 3 feet wide. What is the area of the table?
- A rectangular room is 12 meters long and 8 meters wide. What is the area of the floor of the room?
- A rectangular parking lot is 50 meters long and 30 meters wide. What is the area of the parking lot?
- Charles draws a rectangle with a side length of 9 inches and an area of 27 square inches. What is the other side length?
- Cliff draws a rectangle with a side length of 6 inches and an area of 24 square inches. What is the other side length?

Area of Rectangle Word Problems (Online Worksheet & Answers)

Area & Perimeter of Rectangles 1

Area & Perimeter of Rectangles 2

Area & Perimeter of Rectangles 3

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