Use geometry software such as Geometer's Sketchpad for this problem. If geometry software is not available, collect pictures or models of the different types of triangles and measure the angles with a protractor.
Use the software to measure the angles in each of the triangles in the table. Find the sum of the angles of the triangle. Record your findings.
What patterns do you notice about the sum of the angles in a triangle? Create a few more triangles and find the angle sum for each of them. Do you think these patterns will hold for all triangles? Why or why not?