Question

The. lenglhs of two sides of triangle are ten cm and 15cm. Between what two measures should the length of the third side lie

Answer 1

Since the sum of the lengths of any 2 sides of a triangle > third side

So, if third side is X

10 + 15 > X

10 + X > 15

15 + X > 10

So, possible whole number values of X, which satisfy the above are
X=10+15=25 cm or X=15-10=5 cm

So, X lies between 5 cm & 25 cm.