The perimeter of a triangle is 22 cm. if its two sides measure 9cm and 6cm, find the length of the third side?

Answer: 7cm

Step-by-step explanation:

The perimeter of a triangle is calculated by adding the length of the 3 sides together. Let the third side be x, then

x + 9 + 6 = 22

x + 15 = 22

Subtract 15 from both sides, that is

x = 22 - 15

x = 7

Therefore : the third side is 7cm

Step-by-step explanation:

perimeter of a triangle is the addition of all sides

22 - (9+6)

22 - 15

7