Question

Which of the following is the increasing order of the perimeter for the given rectangles.

• A. 1 < 2 < 3
• B. 2 < 1 < 3
• C. 3 < 2 < 1
• D. 3 < 1 < 2

Answer 1

The correct option is B 2 < 1 < 3

We can find the perimeter of the figures by finding out lengths of each of the sides using the grids.

Perimeter of yellow rectangle = 7 + 3 + 7 + 3 = 20 units
Perimeter of green rectangle = 5 + 4 + 5 + 4 = 18 units
Perimeter of blue rectangle = 2 + 9 + 2 + 9 = 22 units

So, 18 units < 20 units < 22 units

Thus, the increasing order of the perimeter of the rectangles is 2 < 1 < 3.