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- Naming Geometric and Arithmetic Progressions [04/04/2003]
Why is an exponential progression called 'geometric'? Why is a linear
progression called 'arithmetic'?
- Naming Nine Things [01/15/2003]
What is the correct name for nine things collectively? I can only
find the answer up to 7, septuplet, which has been highly publicized
with the McCoy babies.
- Nautical Mph/Knots [08/12/2003]
I want to know how fast the wind is blowing when the weather report
states 5 knots.
- Negating Statements [10/27/1998]
What is negation? What is a statement? How do you negate a statement?
- Nets in a Geometrical Sense [03/07/1999]
What is the "net" of a shape?
- Nonagon or Enneagon? [02/06/2003]
Is 'enneagon' really the correct name for a 9-sided polygon?
- Non-Euclidean Geometry [10/22/2001]
What is non-Euclidean geometry? What two concepts are different from
- Non-Euclidean Geometry for 9th Graders [12/23/1994]
I would to know if there is non-euclidean geometry that would be
appropriate in difficulty for ninth graders to study.
- Normal Distribution Curve [11/13/2000]
What is the normal distribution curve?
- No Slope: An Ambiguous Term [05/08/2003]
What is the distinction between a line with a slope of zero and a
line with no slope?
- No Thickness [12/08/2002]
What is a location in space that has no thickness?
- Number of Cylinder Edges [04/01/2002]
My son was asked "how many edges are there on a solid cylinder?" on a
recent math examination. His answer was "2" and it was marked incorrect.
- Numbers and Digits [09/21/2000]
What is a digit? Why can't we call a digit a number?
- Numbers and Numerals [09/06/1997]
What's the difference between a number and a numeral?
- Numbers and Numerals [08/29/2002]
15/5 and sqrt(9) both reduce to 3, but is it proper to say that they
- Numbers: Cardinal, Ordinal, Nominal? [10/25/1999]
Which group of numbers - cardinal, ordinal or nominal - does "time" fit
into? Are there other types of numbers as well?
- Number Word Etymologies [05/03/2001]
Who made up the names for numbers?
- Obtuse and Oblique [7/29/1996]
Are the terms "obtuse" and "oblique" interchangeable?
- Odds Slang for Probability? [02/06/1997]
Is "odds" slang for probability?
- One- and Two-sided Polygons [12/07/1999]
Can you explain what a monogon and a digon are?
- One Dimension [05/13/2003]
Is there such a thing as 1D?
- Ordered Pairs vs. Coordinates [9/9/1996]
What is the difference between an ordered pair and coordinates?
- Order of Quadrant Numbers [10/21/2002]
Why are quadrants numbered that way?
- Origin, Meaning of 'Hypotenuse' [9/13/1996]
What is the origin and meaning of the term "hypotenuse"?
- Origin of Net View [05/14/2002]
We are studying the volume of pyramids and my students were
interested as to why the 'exploded' look at the pyramid was called
the net view.
- Origin of the Null Symbol [03/05/2003]
Where did the null symbol come from?
- Origin of the Term Acre [03/10/2002]
What is the origin of the measurement acre?
- Origin of the Term "Improper" Fraction [07/28/2006]
Why are fractions with larger numerators than denominators called "improper"? Where did the terms "proper" and "improper" originate in relation to fractions?
- Origin of the Term Logarithm [10/27/1999]
Where does the term logarithm come from?
- Origin of the Terms Sine, Cosine, Tangent, etc. [10/27/1999]
Can you tell me the origin of the terms hypotenuse, sine, cosine, and
tangent? Can you tell me how the trigonometric formulas for sine, cosine,
and tangent came about?
- Origin of the Term Vertical Angles [04/04/2005]
Why do we call them "vertical angles" when many of them are "horizontal" (extending left and right)? Where did that name come from?
- Origin of the Word Pyramid [07/05/1999]
Were the Egyptian pyramids named after the geometric figure 'pyramid' or
- Origin of the Word Root [02/18/2002]
If we set an expression equal to zero, we call the solution the "root" of
the equation. Why?
- Origin of the Word 'Yard' [9/12/1996]
Why do they call a yard, a yard? Where does this word originate?
- Origins of Celsius and Fahrenheit [03/31/2002]
Who invented Celsius and Fahrenheit?
- Parallel Curves [05/21/1997]
If line segments can be parallel, can curves be parallel? Are lines of
- Pareto and Bar Charts [3/12/1997]
What are three distinguishing differences between Pareto Charts and Bar
- Parsec (pc) [10/26/2001]
One of the unit conversions my Casio fx-991MS calculator does is pc to km
and km to pc. What does "pc" mean in this context?
- Parts of a Cone [04/18/2001]
Does a solid cone have any edges?
- Pattern or Sequence? [10/02/2003]
What is the difference between a pattern and a sequence?