Area Formula Method - Rectangles

Area - How it Works - Video

Example 1

Example 1:

For this example, the length is 3 cm and the width is 2 cm. To find the area of a rectangle, one way is to use the area formula which is Area = Length x Width. If we substitute the numbers into the equation, we will get Area = 3 cm x 2 cm. The answer is 6 cm². Now the units must be squared because we are multiplying two numbers which makes it a 2D object.

Now we can see mathematically the area is 6 cm². If we count the number of squares inside, we find that there are 6 squares. We found the area two different ways and it is the same.

Example 2

Example 2:

For this example, the length is 3 cm and the width is 2 cm. To find the area of a rectangle, one way is to use the area formula which is Area = Length x Width. If we substitute the numbers into the equation, we will get Area = 3 cm x 2 cm. The answer is 6 cm². Now the units must be squared because we are multiplying two numbers which makes it a 2D object.

Now we can see mathematically the area is 6 cm². If we count the number of squares inside, we find that there are 6 squares. We found the area two different ways and it is the same.

Example 3

Example 3:

For this example, the length is 5 cm and the width is 2 cm. To find the area of a rectangle, one way is to use the area formula which is Area = Length x Width. If we substitute the numbers into the equation, we will get Area = 5 cm x 2 cm. The answer is 10 cm². Now the units must be squared because we are multiplying two numbers which makes it a 2D object.

Now we can see mathematically the area is 10 cm². If we count the number of squares inside, we find that there are 10 squares. We found the area two different ways and it is the same.

Example 4

Example 4:

For this example, the length is 4 cm and the width is 4 cm. To find the area of a rectangle, one way is to use the area formula which is Area = Length x Width. If we substitute the numbers into the equation, we will get Area = 4 cm x 4 cm. The answer is 16 cm². Now the units must be squared because we are multiplying two numbers which makes it a 2D object.

Now we can see mathematically the area is 16 cm². If we count the number of squares inside, we find that there are 16 squares. We found the area two different ways and it is the same.

Live Worksheet

Teacher - Edpuzzle Link