Question

Find the missing side of each triangle.

A) 10 cm
C) 17.1 cm
E) 5.8 cm
B) 11.4 cm
D) 13.8 cm

Answer 1

By using Pythagoras theorem :

• 
  `{x}^(2) = (12.7) {}^(2) - (5.5)x {}^(2)`

• 
  `{x}^(2) = 161.29 - 30.25`

• 
  `{x}^(2) =131.04`

• 
  `x = √(131.04)`

• 
  `x = 11.4`

Correct choice is B

Answer 2

The choice B) 11.4

Explanation:

`{x}^(2) + {(5.5)}^(2) = {(12.7)}^(2) \\ {x}^(2) + 30.25 = 161.29 \\ {x}^(2) = 13104 \\ x = 11.4`