Question

the length of two sides of triangle are 12 cm and 15 cm and two measure should the length of third side fall​

Answer 1

The measure of the length of the third side of the triangle should fall within

$0cm < 3rd SIDE < 27cm$.

Given

The length of one side of a triangle $=12cm$

The length of the other side of the triangle $=15cm$

Note that the sum of the length of any two sides of a triangle is always greater than the third side.

Again the third side should have a minimum length greater than zero.

Therefore, the required measure of the length of the third side of the triangle should fall within the following limits.

$0cm < 3rd SIDE < (12+15)cm\\0cm < 3rd SIDE < 27cm$