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algebraic proof

use of definitions, axioms, and deductive reasoning to prove algebraic assertions


in reference to a triangle, the perpendicular distance from either the base of the triangle or an extension of the base to the opposite vertex; any side can be the base


the figure formed by two rays that have a common endpoint; the rotation of a ray about its endpoint from an initial position to a final position


the number that tells how many square units are contained in a closed figure

associative property

for any real numbers a, b, and c, (a + b) + c = a + ( b + c) and
(a • b) • c = a • (b • c)


the sum of a set of numbers divided by the number of numbers in the set; also called the mean


a statement that is assumed to be true; also called a postulate

basic arithmetic operations

addition, subtraction, multiplication, and division


a polynomial of two terms

box-and-whisker plot

a method of displaying data using two rectangles called "boxes" and lines on the ends of the boxes called "whiskers" to divide a set of data into four equal or approximately equal groups

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