Question

The lengths of two sides of a triangle are 11 cm and 19 cm. Identify the range of possible lengths for the third side.

Answer 1

2nd option

Explanation:

Given 2 sides of a triangle then the third side x is in the range

difference of 2 sides < x < sum of 2 sides , that is

19 - 11 < x < 19 + 11

8 < x < 30

Answer 2

8 < x < 30

Explanation:

The rule for side lengths of a triangle is:

the sum of two side's must be bigger than the third side and their difference must be smaller than the third side :

19 - 11 < x < 19 + 11

8 < x < 30