
Contact
me: email: laurel(dot)langford(at)uwrf(dot)edu My schedule My office location: 206E NH My office phone number: 7154253119 
Grading
policies,
etc Syllabus 
Useful
Links: 
email Dr Langford: laurel.langford@uwrf.edu
Schedule:
Mon  Wed  Fri 
Sept 3 NH 16 
More decoding of axioms and theorems; order of several important theorems in Euclid; decoding a proof 

Sept 8 The parallel postulate and axiom systems. Equivalent axiom systems. Euclid vs Hilbert vs the axioms we will be using for our class 

Proofs by contradiction Quiz 1 
Sept. 15 SAS. Study Euclid's proof of I.5 online and read Pappus proof in the textbook. 
Euclid's proof of I.5 Watch these videos and finish writing up Euclid's proof of I.5. Part 1, Part 2 (you might need to wait a minute for the pages to load) 
SSS. Here are my notes on SSS. Over the weekend you should study a proof of SSS (my notes, your notes, the proof in the book, whatever...). Then try to write out the proof from memory. It doesn't need to be word perfect, but it does need to have all of the important steps and ideas. 
Sept 22 ASA, Parallel lines exist?  I can't find the file we made in class, so I've rewritten ASA and parallel lines exist. Hopefully it's not different in a confusing way.  Quiz 2 (write out proofs of one of the famous theorems) 
Sept 29 There's a new page in the theorems list, and you'll be proving these easier theorems and sharing your proofs over the next week/2weeks. Start by proving parts of theorem 13 (if a then b, if b then c, etc.)  In class we proved AAS  Quiz 3 write out a proof of another famous theorem (ASA or parallel lines exist) Over the weekend prove more of theorem 13, and prove theorem 14 and 15. 
Oct 6:  
Oct 13:  
Oct 20: 
In the book, pg 71, 2.3N #7 and 8 Prop 2.3.24 Prop I.20, I.21 Hints for 8 and I.21 

Oct 27:  
Nov 3:  
Nov. 10 


Nov. 17: 


Nov 24.  Happy  Thanksgiving 



Dec 8: 


Final exam is  Wednesday, Dec. 17 @ 1:003:00 pm 