Final answer:
The next step after determining a triangle with 3 numbers is to identify the type of triangle.
Step-by-step explanation:
After determining that 3 numbers are a triangle, the next step would be to identify the type of triangle. This involves examining the lengths of the three sides and comparing them to determine if the triangle is equilateral, isosceles, or scalene. For example, if all three sides have equal length, it is an equilateral triangle.