How many unique triangles can be drawn with side lengths 8 in., 12 in., and 24 in.? Explain. Any three sides form a unique triangle, so these lengths can be used to draw exactly 1 triangle. If you draw two of the sides together, the third side could angle in or out from the existing angle, so these lengths can be used to draw exactly 2 triangles. Two of the side lengths add to a sum that is less than the third side length, so these lengths cannot be used to draw any triangles. Any three sides form many triangles with different angles, so these lengths can be used to draw infinitely many triangles.