Question

A triangle has side lengths of 17 cm and 5 cm. Which could be the value of the third side, 26 cm or 21 cm?

Answer 1

21 cm

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

17 - 5 < x < 17 + 5

12 < x < 22

The only given value in this range is 21 cm