Area of Rectangles — Let's Practise!

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Basics on the topic Area of Rectangles — Let's Practise!

Join Razzi and practise finding the area of rectangles!

Transcript Area of Rectangles — Let's Practise!

Razzi says get these items ready because today we're going to practise finding the area of rectangles. It's time to begin! Find the area of this rectangle. Pause the video to work on the problem and press play when you are ready to see the solution! The length is eight square units. The width is two square units. Using the area formula length times width eight times two is sixteen. Did you also get sixteen square units? Let's tackle the next one! Find the area of this rectangle. Pause the video to work on the problem and press play when you are ready to see the solution! The length is seven square units. The width is three square units. Seven times three equals twenty-one. Did you also get twenty-one square units? Let's tackle the next problem! Find the area of this square. Pause the video to work on the problem and press play when you are ready to see the solution! The length is three square units. The width is three square units. Three times three equals nine. Did you also get nine square units? Let's solve the final one! Find the area of this rectangle. Pause the video to work on the problem and press play when you are ready to see the solution! The length is five square units. The width is four square units. Five times four equals twenty. Did you also get twenty square units? Razzi had so much fun practising with you today! See you next time!

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Area of Rectangles — Let's Practise! exercise

Would you like to apply the knowledge you’ve learnt? You can review and practice it with the tasks for the video Area of Rectangles — Let's Practise!.

How do we find the area of a rectangle?
Hints

Part of the formula is to multiply the longer side of the rectangle.
For example, in this rectangle, 8 x (other measurement) = area.

Part of the formula is to multiply the shorter side of the rectangle.
For example, in this rectangle, 2 x (other measurement) = area.

Solution
length x width = area squared.
- To find the area of a rectangle, multiply the length of the rectangle by the width. Your answer should be squared.
- This rectangle has an area of 16 units squared because 8 (length) x 2 (width) is 16.
Find the length and width of the various rectangles.
Hints

Count the squares on the longest side to find the length.

Count the squares on the shortest side to find the width.

Solution
Rectangle 1
- Length = 8 units
- Width = 3 units
Rectangle 2
- Length = 4 units
- Width = 2 units
Rectangle 3
- Length = 6 units
- Width = 3 units
Rectangle 4
- Length = 8 units
- Width = 1 unit
Find the area of the various rectangles.
Hints

To find the area of a rectangle, multiply the length of the rectangle by the width. On this rectangle, the length is 8 units and the width is 2, so multiply 8 x 2 to find the area.

To find the area of a rectangle, you can multiply the sides or you can also count the total number of squares.

Solution
Rectangle 1
- 6 x 3 = 18 square units.
Rectangle 2
- 1 x 8 = 8 square units.
Rectangle 3
- 3 x 8 = 24 square units.
Rectangle 4
- 2 x 4 = 8 square units.
Find the area of each rectangle.
Hints

Count the squares on the longest side to find the length, then multiply this measurement by the width.

Count the squares on the shortest side to find the width, then multiply this measurement by the length.

To find the area of a rectangle, you can multiply the sides or you can also count the total number of squares.

Solution
Square 1
- Length = 3, width = 3
- 3 x 3 = 9 units squared
Rectangle 2
- Length = 8, width = 3
- 8 x 3 = 24 units squared
Rectangle 3
- Length = 5, width = 4
- 5 x 4 = 20 units squared
Rectangle 4
- Length = 8, width = 2
- 8 x 2 = 16 units squared
What is the area of the rectangle?
Hints

Count the squares on the longest side to find the length.
For example, the length of this rectangle is 8 units.

Count the squares on the shortest side to find the width.
For example, the width of this rectangle is 2 units.

To find the area of a rectangle, you can multiply the sides, or you can also count the total number of squares.

Solution
- The longest side is 5 units. This is the length.
- The shortest side is 4 units. This is the width.
- Length x width = area squared.
- 5 x 4 = 20 units squared.
Find the area, length or width of the various rectangles.
Hints

Count the squares on the longest side to find the length, then multiply by the width to find the area.
In this rectangle, the length is 8 units, and the width is 2 units.
8 x 2 = 16.
The area is 16 units squared.

To find the length, count the longer side, or divide the area by the width.
This rectangle has an area of 16 units squared.
This rectangle has a width of 2 units.
16 ÷ 2 = 8.
The length is 8 units.

To find the width, count the shorter side, or divide the area by the length.
This rectangle has an area of 16 units squared.
This rectangle has a length of 8 units.
16 ÷ 8 = 2.
The length is 2 units.

Solution
Rectangle 1
- 8 x 12 = 96
- The area is 96 square units.
Rectangle 2
- 45 ÷ 5 = 9
- The length is 9 units.
Rectangle 3
- 36 ÷ 9 = 4
- The width is 4 units.
Rectangle 4
- 7 x 8 = 56
- The area is 56 square units.