Question

In triangle QRS, QR = 8 and RS = 5. Which expresses all possible lengths of side QS?

QS = 13
5 < QS < 8
QS > 13
3 < QS < 13

Answer 1

third option

Explanation:

given 2 sides of the triangle then the third side QS is in the range

difference of 2 given sides < QS < sum of 2 given sides , that is

8 - 5 < QS < 8 + 5 , then

3 < QS < 13