Math 411: Geometry

e-mail Dr Langford:

Axioms and theorems list (file is updated regularly)


Mon Wed Fri

Sept 5 About the class; proof by contradiction; proof by cases.
HW: **-ed items on page 1 (prove, write up, turn in.)

Reprove/ rewrite the proof for the line separation corollary. Extra hints for the third (trickiest) case.

Sept 10


Sept. 17

  Non-Euclid appet
Sept 24    
Oct 1
Oct 15 Here is the text of the proofs we did in class today. (Word document, pdf)
Things that may be on the test.

Exam this Friday


My write up of the area of  triangle formula proof