Rectangle Area Calculation: Using Perimeter of 30 and Width of 5

The perimeter of the rectangle below is equal to 30.

What is the area of the rectangle?

101010555AAABBBDDDCCC

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1

Understand the problem

The perimeter of the rectangle below is equal to 30.

What is the area of the rectangle?

101010555AAABBBDDDCCC

2

Step-by-step solution

We use the formula to calculate the area of a rectangle: length times width:

AC×AB=S AC\times AB=S

We replace the existing data:

5×10=50 5\times10=50

That is, the information that the perimeter of the rectangle is equal to 30 is unnecessary, since all the data to calculate the area already exist and it is not necessary to calculate the other sides.

3

Final Answer

50

Practice Quiz

Test your knowledge with interactive questions

Look at the rectangle ABCD below.

Side AB is 6 cm long and side BC is 4 cm long.

What is the area of the rectangle?
666444AAABBBCCCDDD

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