# 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.