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 TOPICS This page:   definitions    Search   Dr. Math See also the Internet Library:   dictionaries MIDDLE SCHOOL About Math Algebra    equations    factoring expressions    graphing equations Arithmetic    division    exponents    factorials    factoring numbers    fractions/percents    logarithms Definitions Geometry    2-dimensional      conic sections/        circles      triangles/polygons    3D and higher      polyhedra History/Biography Logic Measurement    calendars/      dates/time    temperature    terms/units Number Sense    factoring numbers    negative numbers    pi    prime numbers    square roots Probability Puzzles Ratio/Proportion Statistics Word Problems Browse Middle School Definitions Stars indicate particularly interesting answers or good places to begin browsing. Name of Division Symbol [7/31/1996] What is the official name for the division symbol? Name of Fraction Bar [7/5/1996] What is the correct term for the line that separates the numerator and denominator of a fraction? Names of Parts of a Cone [8/2/1996] Are the components of a net of a cone called faces in all cases, or only for polyhedra? Names of Polynomials [11/25/1997] Are polynomials with higher degree than 5 named? What are they called? 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 Euclidean geometry? 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 are integers? 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 vice-versa? 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 latitude parallel? Page: []

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