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Math Forum » Discussions » Math Topics » geometry.pre-college.independent

Topic: (2-col.) Proofs (see also Sketchpad & Triangle Congruence)
Replies: 80   Last Post: Jun 20, 1995 11:48 AM

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Heidi Burgiel

Posts: 44
Registered: 12/3/04
Re: Two-column proofs
Posted: Jan 24, 1995 7:41 AM
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In my college calculus class (honors), we started from very basic
principles. For the first one or two homework assignments we had to
do things like prove that -(-a) = a. So, when I sat down to my
homework, I carefully divided the paper into two columns and proceeded
as I had in my high school geometry class. (Proofs of such "obvious"
facts actually seem easier to do by such a rigid method.)

Needless to say, the poor grader/TA was beside himself when he saw
this! He was fresh out of grad. school and had never seen a two
column proof in his life.

Heidi B.







Date Subject Author
1/23/95
Read (2-col.) Proofs (see also Sketchpad & Triangle Congruence)
Bob Hayden
1/24/95
Read Re: Two-column proofs
Lou Talman
1/24/95
Read Re: Two-column proofs
John Conway
1/24/95
Read Re: Two-column proofs
Heidi Burgiel
1/24/95
Read Re: Two-column proofs
roitman@oberon.math.ukans.edu
1/24/95
Read Re: Two-Column Proofs
Marksaul@aol.com
1/24/95
Read Re: Two-column proofs
John Conway
1/24/95
Read Re: Two-column proofs
John Conway
1/24/95
Read Re: Two-Column Proof
John Conway
1/24/95
Read Re: Two-column proofs
Walter Whiteley
1/24/95
Read Re: Two-column proofs
Pat Ballew
1/25/95
Read Re: Two-Column Proof
W Gary Martin
1/25/95
Read 2-col. proofs
Bob Hayden
1/25/95
Read Formal Proofs in Geometry
Walter Whiteley
1/25/95
Read Re: Two-column proofs
Dave Wilson
1/25/95
Read 2-column proof example
Annie Fetter
1/25/95
Read Re: Two-column proofs
Lou Talman
1/25/95
Read Re: 2-col. proofs
John Conway
1/25/95
Read Re: 2-col. proofs
Michael Keyton
1/25/95
Read Re: 2-col. proofs
John Conway
1/27/95
Read Re: Two-column proofs
Andre TOOM
1/27/95
Read Re: Two-column proofs
Lou Talman
1/27/95
Read Re: Two-column proofs
W Gary Martin
1/27/95
Read Re: Two-column proofs
Michelle Manes
1/27/95
Read Re: Two-column proofs
Andre TOOM
1/28/95
Read 2 column proofs
Ronda Delcamp (Lewandowski)
1/31/95
Read Re: 2 column proofs
Walter Whiteley
1/28/95
Read Still two column proofs
John A Benson
1/28/95
Read Re: 2 column proofs
bo3b Overkamp
1/28/95
Read Re: 2 column proofs
SCOTT SMITH 216831-2200
1/29/95
Read Re: 2 column proofs
Andre TOOM
1/29/95
Read Re: Two-column proofs
John Conway
1/29/95
Read Re: 2-col. proof
John Conway
1/29/95
Read Re: 2 column proofs
John Conway
1/29/95
Read Re: Two-column proofs
R. D. Foster
1/30/95
Read Re: Still two column proofs
Robin Mc Leod
1/30/95
Read Not quite two column proofs
roitman@oberon.math.ukans.edu
1/30/95
Read Re: Still two column proofs
John Conway
1/30/95
Read Re: 2 column proofs
W Gary Martin
1/30/95
Read Re: 2 column proofs
Dan Hirschhorn
1/30/95
Read Re: 2 column proofs
G. Tupper
1/30/95
Read Re: 2-col. proofs
Bob Hayden
1/31/95
Read Re: 2 column proofs
John Conway
1/31/95
Read Re: 2 column proofs
Walter Whiteley
1/31/95
Read Proof in High school
John A Benson
1/31/95
Read 2-column proof
David Scott Powell
2/1/95
Read Re: 2 column proofs
W Gary Martin
2/1/95
Read 2-column proof
David Scott Powell
2/1/95
Read Re: Proof in High school
Robin Mc Leod
2/1/95
Read Re: 2 column proofs
Andre TOOM
2/1/95
Read Re: 2-column proof
William T. Webber
2/1/95
Read Re: 2-column proof
John Conway
2/2/95
Read Re: 2-column proof
G. Tupper
2/2/95
Read 2-column proof
David Scott Powell
2/2/95
Read Re: 2-column proof
Henri Picciotto
2/2/95
Read Re: 2 column proofs
Andre TOOM
2/2/95
Read Re: 2-column proof
Michelle Manes
2/2/95
Read Re: 2-column proof
Dan Hirschhorn
2/2/95
Read Re: 2-column proof
John Conway
2/2/95
Read Re: 2-column proof
Michael Keyton
2/2/95
Read Re: 2-column proof
Michelle Manes
2/2/95
Read Re: 2-column proof
Jim Swift
2/2/95
Read Re: Proof in High school
John Conway
2/3/95
Read Re: 2-column proof
Bill Marthinsen
2/3/95
Read Two-column proofs
J. Wendell Wyatt
2/3/95
Read Two-column proofs
J. Wendell Wyatt
2/5/95
Read 2-column proof
Marksaul@aol.com
2/5/95
Read proving the obvious
Marksaul@aol.com
2/7/95
Read Proofs in UK Schools
Jim Swift
2/12/95
Read 2-column proofs: motivations/techniques
John Tant
2/12/95
Read Re: 2-column proof
John Conway
2/14/95
Read Re: 2-column proofs: motivations/techniques
David Scott Powell
2/14/95
Read Re: Proofs in UK Schools
John Conway
2/17/95
Read Re: 2-column proofs: motivations/techniques
LaVerta K Schmeling
2/18/95
Read Re: 2-column proofs: motivations/techniques
Allan Mundsack
2/20/95
Read Re: 2-column proofs: motivations/techniques
Lou Talman
2/20/95
Read Re: 2-column proofs: motivations/techniques
roitman@oberon.math.ukans.edu
2/21/95
Read Re: 2-column proofs: motivations/techniques
Doris Schattschneider
2/21/95
Read Re: 2-column proofs: motivations/techniques
Kathryn Garrett
2/21/95
Read Re: 2-column proofs: motivations/techniques
John Tant
6/20/95
Read A comment from Jan Hall
Sarah Seastone

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