Step 1: Note down the given lengths

            EXAMPLE: a = 1.2,

                                b = 1.6 and

                                c = 3.1

Step 2:  Arrange the three numbers in order from smallest to largest  

            EXAMPLE: a < b < c

                              1.2 < 1.6 < 3.1

Step 3: Recall the Triangle Inequality Theorem

            NOTE: The Triangle Inequality theorem states that the sum of any two

            sides of a triangle must be greater than the measure of the third side.  

      EXAMPLE: a, b, and c are the side lengths of a triangle if and only if a + b > c.

Step 4: Add any two sides.

            EXAMPLE: 1.2 + 1.6 =3.1

                                1.2 + 3.1 = 4.3

                                1.6 + 3.1 = 4.7

Step 5: Compare the sums of two sides with the third side.

            NOTE:  The sum of two sides is greater than the measure of a third side,

            then you know that the sides make up a triangle. Otherwise not

            EXAMPLE: 3.1 =  3.1

                                4.3 > 3.1

                                4.1 > 3.1

             so, we can not make a triangle withe these sides. because the sum of two

             sides is equal to third side.