Some Solved Examples On Perimeter (Word Problems)

1. Find the perimeter of the quadrilateral with sides 5 cm, 7 cm, 9 cm and 11 cm.

Solution:

The formula to find the perimeter of the quadrilateral = sum of the length of all the four sides.

Here the lengths of all the four sides are 5 cm, 7 cm, 9 cm and 11 cm.

Therefore, perimeter of quadrilateral = 5 cm + 7 cm + 9 cm + 11 cm = 32 cm

2. The perimeter of the quadrilateral is 50 cm and the lengths of three sides are 9 cm, 13 cm and 17 cm. Find the missing side of the quadrilateral.

Solution:

Let the missing side of the quadrilateral = x

Perimeter of the quadrilateral = 50 cm

The lengths of three sides are 9 cm, 13 cm and 17 cm

Perimeter of the quadrilateral = sum of the length of all the four sides.

50 = 9 cm + 13 cm + 17 cm + x

50 = 39 + x

x = 50 - 39

x = 11

Therefore, the missing side of the quadrilateral = 11 cm.