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Topic: trapezoid clarification
Replies: 55   Last Post: Apr 24, 2017 2:30 PM

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Joan Rogers-Harrington

Posts: 1
Registered: 5/21/14
Re: trapezoid clarification
Posted: May 21, 2014 10:11 PM
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Keep them coming. I don't think I am a fan of the inclusive definition. Too confusing.



>>> Jonathan 05/17/14 10:17 AM >>>

I'm sorry, I'd be curious which.




I don't have the biggest collection at home, but

Michael Serra's Discovering Geometry - no

Dressler (several books, from the early 70s to today, mostly cut and past from each other) no

Jacobs Geometry (cool book) no

Jurgenson Brown Jurgenson (McDougal Littel) traditional, - no

Unified mathematics (Houghton Mifflin, 1981, out of use - no

Weeks and Adkins 1961 - no

World Book Modern School Geometry 1938 - no

and two late 19th century American volumes

Solid Geometry (Wentworth, 1899) and

Bradbury's Elementary Geometry 1872 - no and no.




So yes, I would be curious what American text uses the inclusive definition.




Jonathan Halabi

the Bronx





On Sat, May 17, 2014 at 9:39 AM, Eleanor Pupko <epupko2@hotmail.com> wrote:

Some texts use this definition.

Eleanor

Sent from my iPhone


On May 17, 2014, at 8:51 AM, "Jonathan" <jd2718@gmail.com> wrote:



With all due respect Meg, I do not believe there is anywhere in the US where this

"Although this might be a surprise to NYS teachers who have used the exclusive definition, this is a common definition for trapezoid."

is true.




It might be a better convention, but in this country, it has never before been ours.




I am quite disappointed that AMTNYS transmitted this information, and did not lead a campaign to challenge it.




Jonathan Halabi

the Bronx








On Sat, May 17, 2014 at 8:31 AM, Meg Clemens <mclemens@twcny.rr.com> wrote:

At training in Albany this past week, NYSED released a standards clarification document for Geometry that states (among other items) that a trapezoid is now defined with the ?inclusion? definition: a trapezoid has at least one pair of parallel sides. Although this might be a surprise to NYS teachers who have used the exclusive definition, this is a common definition for trapezoid.

Three questions:

1. Is this standards clarification memo posted on engageny anywhere yet? I couldn?t find it.

2. How do we treat conflicting definitions next year when we are preparing students for both regents?

3. With the new definition, what is an isosceles trapezoid? I think we need clarification on this.

a. If I use trapezoid w/ one pair of opposite sides congruent, then a parallelogram is an isosceles trapezoid but its base angles are not congruent.
b. If I use trapezoid w/ one pair of opposite sides congruent and base angles are congruent, then rectangles and squares are isosceles trapezoids, which might be OK.
c. There is an alternative definition that uses one axis of symmetry and one w/ no symmetry to yield the usual depiction of an isosceles trapezoid.


Meg Clemens
Canton Central School


Date Subject Author
5/17/14
Read trapezoid clarification
Meg Clemens
5/17/14
Read Re: trapezoid clarification
Jonathan Halabi
5/17/14
Read Re: trapezoid clarification
Eleanor Pupko
5/17/14
Read Re: trapezoid clarification
ElizWaite@aol.com
5/17/14
Read Re: trapezoid clarification
Jonathan Halabi
5/17/14
Read Re: trapezoid clarification
sherry
5/17/14
Read Re: trapezoid clarification
Roberta M. Eisenberg
5/17/14
Read Re: trapezoid clarification
Jonathan Halabi
5/17/14
Read Re: trapezoid clarification
JFish@csufsd.org
5/19/14
Read Re: trapezoid clarification
Tom Kenyon
5/19/14
Read RE: trapezoid clarification
Dianne Gizowski
5/17/14
Read Re: trapezoid clarification
GPJ
5/17/14
Read Re: trapezoid clarification
Jonathan Halabi
5/17/14
Read Re: trapezoid clarification
JFish@csufsd.org
5/18/14
Read Re: trapezoid clarification
michelle Van Etten
5/18/14
Read RE: trapezoid clarification
barrpub
5/18/14
Read Re: trapezoid clarification
Roberta M. Eisenberg
5/18/14
Read Re: trapezoid clarification
Kathy
5/19/14
Read Re: trapezoid clarification
Roberta M. Eisenberg
5/19/14
Read RE: trapezoid clarification
Elaine Zseller
5/18/14
Read Re: trapezoid clarification
Roberta M. Eisenberg
5/21/14
Read Re: trapezoid clarification
Joan Rogers-Harrington
5/25/14
Read Re: trapezoid clarification
Jennifer Sauer
5/27/14
Read RE: trapezoid clarification
Elaine Zseller
5/27/14
Read Re: trapezoid clarification
gWilkie@highlands.com
5/28/14
Read Re: trapezoid clarification
Bruce Waldner
5/28/14
Read Re: trapezoid clarification
L.C.
5/28/14
Read Re: trapezoid clarification
Jonathan Halabi
5/28/14
Read RE: trapezoid clarification
GPJ
6/3/14
Read RE: trapezoid clarification
Elaine Zseller
6/3/14
Read Re: trapezoid clarification
Roberta M. Eisenberg
6/5/14
Read Re: trapezoid clarification
gWilkie@highlands.com
6/16/14
Read Re: trapezoid clarification
Virginia Kuryla
6/17/14
Read RE: trapezoid clarification
Elaine Zseller
6/18/14
Read Algebra 2 Trig Regents
Thompson, Patricia
6/18/14
Read RE: Algebra 2 Trig Regents
Kevin Connolly
6/18/14
Read Re: Algebra 2 Trig Regents
Denise C. Pusateri
6/18/14
Read Re: Algebra 2 Trig Regents
Betty Worthington
6/18/14
Read Re: Algebra 2 Trig Regents
Daniel Knaisch
6/18/14
Read Re: Algebra 2 Trig Regents
Cheryl Novick
6/20/14
Read Re: Algebra 2 Trig Regents
Kelly Stone
6/20/14
Read Re: Algebra 2 Trig Regents
Ann Murray
6/20/14
Read Re: Algebra 2 Trig Regents
Daniel Knaisch
6/20/14
Read RE: Algebra 2 Trig Regents
Holly Brightman
4/24/17
Read Statistics Algebra 2
Thompson, Patricia
4/24/17
Read Re: Statistics Algebra 2
Bob Bieringer
6/3/14
Read Re: trapezoid clarification
Jonathan Halabi
6/4/14
Read Heads up - cheating
Tom Kenyon
6/4/14
Read RE: Heads up - cheating
Cooney, Amanda
6/4/14
Read Re: Heads up - cheating
StGOLD2112@aol.com
6/4/14
Read Re: Heads up - cheating
Morse, Dana
6/4/14
Read Re: Heads up - cheating
Kathy
5/28/14
Read Re: trapezoid clarification
Virginia Kuryla
6/2/14
Read RE: trapezoid clarification
Elaine Zseller
5/29/14
Read Re: trapezoid clarification
Art Kalish
6/4/14
Read Re: trapezoid clarification
CCSSIMath

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