13. Sam, Kendra, and Tony are standing in such a way that if lines were drawn to connect the
friends they would form a triangle. If Sam is looking at Kendra he needs to turn his head 40° to
look at Tony. If Tony is looking at Sam he needs to turn his head 50° to look at Kendra. How
many degrees would Kendra have to turn her head to look at Tony if she is looking at Sam? Draw
a model of this situation, then answer the question.
