Interior & Exterior Angles of a Triangle
Record several sets of measurements in a chart like this one.
What do you notice about the angle measures as the shape of the triangle changes?
1. What is the sum of the 3 interior angles? 2. What other angle pairs would you like to add together? 3. How is exterior related to the other angles? 4. What is the sum of the 3 exterior angles (one at each vertex)?