How Many Unique Triangles

In this math video we will determine how many unique triangles can be formed. We will be given three angle measures and asked how many unique triangles can be formed. We will review and understand that the three interior angles of any triangle must have a sum of 180 degrees. We will add the three angles together and learn they have a sum more than 180 degrees. Therefore the three angles cannot form a triangle and the answer is none. An exemplar solution is modeled and explained.