Carla and Marty have three straws. The straws have lengths 8 inches, 10 inches and 14 inches. They are going to use their straws to form a triangle. Carla predicts that they will be able to make at least two different triangles. Marty predicts that each of their triangles will be exactly the same, so there is really only one triangle that can be formed. Who is correct? Explain your reasoning.