Google Classroom
GeoGebraGeoGebra Classroom

Interior & Exterior Angles of a Triangle

Record several sets of measurements in this chart.

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)?