Question

the lengths of two sides of a triangle are 12cm and 15 cm .between ehat two measures should the length of third sofe fall

Answer 1

In a triangle, the sum of the lengths of either two sides is always greater than the third side and also, the difference of the lengths of either two sides is always lesser than the third side. Here, the third side will be lesser than the sum of these two (i.e.,

12 + 15 = 27)
and also, it will be greater than the difference of these two
(i.e., 15 − 12 = 3).

those two measures are
27cm and 3 cm.