
Parabola  set of points equal distance from a focus and a directrix 

Parallel  extending where each matching point on different lines is equidistant 

Parallelogram  A quadrilateral with both pairs of opposite sides parallel to each other. 

Pentagon  A polygon having five angles and five sides. Each angle is 108 degrees. 

Percent  a number out of 100 (%) Example: "50%, 75%" 

Perimeter  The border of a twodemensional figure. 

Perpendicular  at right angles to 

Pi  ratio of the circumference to the diameter of a circle (3.1415926...) 

Plane Geometry  area of geometry dealing twodimensional figures 

Point  "a place in space with zero dimensions, shape, size, or extension" 

Polygon  A closed figure with three of more straight sides. 

Positive Number  A number that is greater than zero. Example: 1,2,3,4,5,6,7 

Prime Factorization  Calculation of all prime factors in a number. Example: The prime factors of 84 are 7 x 3 x 2 x 2.


Prime Number  any integer that cannot be divided by another number evenly except by itself and 1; two is the smallest prime number Example: "2, 3, 5, 7, 11, 13" 

Prism  A solid with bases that are parallel, congruent polygons and sides that are parallelograms. 

Probability  The possibility that an event will occur, as expressed by the ratio of the number of actual occurances to the total of possible occurances. 

Product  the number that results by multiplying two or more numbers together Example: 8 x 8 = 64 64 is the product 

Proper Factor  Any wholenumber factor of a number except the number itself.
Example: For example, the factors of 10 are 1, 2, 5, and 10. The proper factors of 10 are 1, 2, and 5. 

Proper Fraction  A fraction with a numerator less than the denominator. Example: Proper: 1/2 Improper: 2/1 

Pyramid  a shape with a polygonal base and triangular sides meeting at a common point (vertex) 