1. What are the shortest distance paths in hyperbolic geometry?
   a)Paths that are perpendicular to the boundary of the Poincare disk model representation
   b)symmetric paths
   c)feel straight intrinsically
   d)more than one of the above but not all of the above
   e)all of a, b and c
   
   
   
   
2. In the existence portion of Playfair's postulate, to show that a parallel exists, we used:
   a) perpendicular to the perpendicular to the line
   b) Euclid's I-11 and I-12
   c) Euclid's I-16
   d) more than one of the above but not all of the above
   e) all of a, b and c
   
   
   
   
3. What goes wrong in spherical geometry?
   a) Euclid's I-11
   b) Euclid's I-12
   c) Euclid's I-16
   d) more than one of the above but not all of the above
   e) all of a, b and c