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Browse Middle School Definitions

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A student has a question about units of weight.

A description of skew lines including diagrams and definitions.

More on Q.E.D.

Who Invented the Square Root? [12/11/1996]
I've only seen long, stringy roots!

Whole Numbers and Multiples [09/11/2001]

Why Cubed? [11/27/2001]

Why Does 1 Degree Equal 60 Minutes? [07/28/2004]
In 60 minutes, the minute hand of a clock makes a full circle, which is 360 degrees. How can 60 minutes equal 1 degree when measuring angles?


Why is a circle defined as 360 degrees?




Why is the Word "Number" Abbreviated to "No."? [05/13/2002]
Why is the word number abbreviated to no.?


Why Y Rises and X Runs [12/19/2012]
A teacher seeks an explanation for why slope is "rise over run" rather than "run over rise." Doctor Peterson reveals the logic, as well as a way to investigate these kinds of imponderables, before affirming her derivation from slope-intercept form and suggesting related motivations from other applications.

Wondrous Numbers [02/07/2001]
What is a wondrous number?

Word for a 225th Birthday [07/10/2001]



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