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Topic: Re: Starting Proofs
Replies: 0

 Tony George Posts: 100 Registered: 12/3/04
Re: Starting Proofs
Posted: Sep 19, 2008 1:29 PM

T agree with you. I used to start by teaching those line seg. and angle theorems like "All right angles are congruent" but I concluded it confused and turn off the students to proofs. Now we start with the postulates and necessary definitions, discuss the above mentioned theorems(stating that they can be proven and maybe referring to one such proof in the text) and then jump right into triangle proofs. I don't recall any past regents having a seg/angle proof unless it involved corresponding parts of conguent polygons.
Tony

>>> mrcoffie <mrcoffie@gmail.com> 09/19/08 11:43 AM >>>
Hi all~
We're just beginning proofs using AMSCO's Geometry book. They present proving segments/angles equal and also proving segments/angles congruent. Does anyone have a good 'feeling' about which the state will choose? Reviewing previous material and drawing on my own HS experiences, it was mostly proving figures congruent. Whaddya think?

Also, another question arises: what is the need for using transitive and symmetric property when you can use the substitution property?

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