Draw a triangle with a perimeter of 50 ft.
You can make the sides of the triangle whatever you want as long as those lengths add up to 50. Are there no other requirements?
20+20+10
15+15+20
and on and on...
actually, there is one other requirement. The sum of the lengths of any two sides has to be greater than the other side.
1,3, 46 would not make a triangle.