The Math Forum

Search All of the Math Forum:

Views expressed in these public forums are not endorsed by NCTM or The Math Forum.

Math Forum » Discussions » Professional Associations » nyshsmath

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: PARCC Definition of Trapezoid
Replies: 15   Last Post: Jun 19, 2013 9:47 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]

Posts: 1
From: Rhode Island
Registered: 6/19/13
Re: PARCC Definition of Trapezoid
Posted: Jun 19, 2013 9:47 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

When I was growing up, I learned the "at least one pair of parallel sides" definition of a trapezoid. I have always stuck by this definition. However, this is a matter of debate throughout the math world - the inclusionary definition and the exclusionary definition. I say it is a case of "all squares are rectangles, but not all rectangles are squares" type logic. At least one pair of parallel sides works for all parallelograms when looking at formulas for area. The formula for the area of a trapezoid works for all parallelgrams as well.

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© The Math Forum at NCTM 1994-2018. All Rights Reserved.