Using the dynamic geometry software Cinderella, investigate what triangles look like in Euclidean, Hyperbolic, and Spherical geometry. From your investigations answer the following question:
How many degrees are in a triangle in each geometry?
Be prepared to show examples to support your answer.
If time permits, examine Taxi-Cab geometry: segments, perpendicular bisectors, midpoints, circles, and pi. Look at Taxicab geometry power point by Lexi Wall.
updated by Glen Richgels