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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. Pareto and Bar Charts [3/12/1997] What are three distinguishing differences between Pareto Charts and Bar Charts? 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? A Peck of Peppers [02/27/2002] If Peter Piper picked a peck of pickled peppers, how many pickled peppers did Peter Piper pick? How much is a peck? Pentagram [12/08/2001] Is a five-pointed star on a flag a decagon? Or just five triangles? Percent Greater Than vs. Increased [11/22/2002] Is there a difference between the following statements? My profits are 200% greater than they were last year; My profits from last year have increased 200%. Percent Increase and "Increase by a Factor of ..." [08/01/2006] If we start with 1 apple today and tomorrow have 2 apples, then we have a 100 percent increase. But can't I also say there was an increase by a factor of 2? Perfect Numbers [08/14/1997] What is the highest perfect number that has been found? How many perfect numbers are there? What are they? Perfect Square: Definition [10/24/1999] What is a perfect square? Perimeter of an Oval [04/08/1999] What is the perimeter of an oval called? pH Definition [10/20/2001] What is the 'p' in pH? Phi [05/18/1997] What is phi? Point Symmetry [08/19/2001] What exactly is point symmetry? How can one tell if point symmetry is present? Polygon Names [09/18/2001] Why is a 3-sided polygon called a triangle instead of a tri-gon? Why is a 4-sided polygon called a quadrilateral instead of a tetragon, when all the others are ___-gons? Why is there not a single consistent term? Polyhedra: Classification, Theorem [02/12/1998] I would like to know how polyhedrons are classified, which figures can be used for the faces, and the theorem relating the faces, edges, and vertices. Polyominoes [09/08/1997] I am using polyominos, but I do not know how to tell my dad what they are. How can I tell him so he will know? Polyominos [08/11/1999] What is the definition of a polyomino? The Pound Sign [04/06/2001] Can the # symbol be used to represent the weight unit 'pounds'? Power or Exponent? [10/14/2003] I always thought that 'power' was just a synonym for 'exponent'. Is that incorrect? Prime Numbers [01/31/1997] What are the prime numbers and why are they prime numbers? Prime Numbers vs. Prime Factors [01/13/1997] What is the difference between a prime number and a prime factor? Principal Square Root Positive [10/24/2002] Why are we always taught that the principal square root of a number is positive? Profit Margin and Percentage Markup [02/16/2007] I own a small business and am a little confused about the difference between a percentage markup and a profit margin. Are they the same thing? If not, how are they different? Pronumerals [05/14/2002] What is a 'pronumeral'? Pronunciation of Fractions [03/28/1997] How do you pronounce fractions with 32, 42... in the denominator...? Proofs with Isosceles Triangles [10/28/1998] What are altitudes, angle bisectors, and medians? How do you prove that in an isoseles triangle, the altitude is a median and an angle bisector? Proportionality Symbol [05/20/2003] Do you know the name of the little symbol used in the topic of rates and variation that means 'in proportion to'? Pyramid Corners [05/01/2001] How many corners does a pyramid have? Is a corner the same thing as a vertex? Pyramids and Triangular Prisms [05/09/2000] What's the difference between a pyramid and a triangular prism? Quadrant [03/25/2001] What is a quadrant? Quadratic Equation [7/10/1996] Why is a quadratic equation "quadratic"? Quadratic Equations [12/3/1995] My students want to know why an equation of the second degree is referred to as a quadratic equation. What does the prefix quad have to do with second degree equations? Quadrilateral Classification: Definition of a Trapezoid [01/15/1997] What is the correct definition of a trapezoid, and why? Quadrilaterals [8/31/1995] What is 4-sided and has no equal angles? Range, Mean, Median, and Mode [11/17/1998] Why do we study range, mean, median, and mode? How will these concepts help me in real life? Ratios and Fractions: A Reconciliation [04/02/2013] Teachers disagree about whether a fraction can compare part to part. Doctor Peterson first distinguishes between ratios and fractions before reconciling them and warning against inflexible thinking. Ray, Line Segment, Line [08/23/1997] I need to know definitions for ray, line segment, and line. Rays and Angles [11/24/1997] Do rays have an arrow on both ends, or is that an angle? Reciprocals [12/19/1996] What is the use of reciprocals? Page: []

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