Question

the length of two sides of a triangle are 12cm and 13cm . between what two measures should the length of the third side fall ?

Answer 1

Maximum length of third side would be less than sum of other two sides.
Third side is less than 12+13=25cm
Minimum length of third side would be greater than modulus of difference of other sides.
Third side is greater than |12-13|= 1cm.
Therefore third side is between 1cm and 25cm.