Two sides of a triangle have side lengths of 17 meters and 12 meters.  What is the possible length range for the third side? 

Concept: Because the lengths of any two sides of a triangle must add up to more than the length of the third side.

Given that the two sides of the triangle are 12cm and 17cm.

As a result, the third side must be less than $12+17=29cm.$

Furthermore, the third side cannot be less than the difference between the first two sides.

So, the third side must be greater than $17-12=15cm$.

As a result, the length of the third side should be greater than 5 cm but less than 29 cm.

So possible range = 5 < x< 29