Math Arguments

Problems, Questions, and Puzzles to spark discussion and argument in the maths classroom.

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Item 522

Trapezoids ...

from Kevin Shonk (via email)

What makes for a better definition?

  • A trapezoid has at least 1 pair of parallel sides 

    • OR 

  • a trapezoid has exactly one pair of parallel sides? 

Categorize it:
Is a parallelogram a type of trapezoid or is a trapezoid a type of parallelogram?


What other mathematical aspects of this caught your attention? What do you wonder about the situation?

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Search for similar questions:

Notice, Wonder
internet
GEOM

Source: internet
More Information:
Noticing and wondering is a tool to help students:
- Understand the story, the quantities, and the relationships in the problem.
- Understand what the problem is asking and what the answer will look like. Have some ideas to begin to solve the problem.
More Here at NCTM


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