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### 26 Cards in this Set

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 additive inverse Two numbers with a sum of zero. Example: 23 and -23 are additive inverses because -23 + 23 = 0. alternate exterior angles Nonadjacent exterior angles found on opposite of the transversal. Example: / 1 & / 7, and / 2 & / 8 in diagram. alternate interior angles Nonadjacent interior angles found on opposite sides of the tranversal. Example: / 4 & / 6, and / 3 & / 5 in diagram. arithmetic sequence A sequence of numbers in which each term after the first is the result of adding a fixed number (called the common difference) to the previous term. Example: The sequence 4, 10, 16, 22, 28, 34,... is an arithmentic sequence. The common difference is 6. complementary angles Two angles whose measures add to equal 90 . Example: / BCA and / CAB are complementary angles in the diagram. corresponding angles Pairs of nonadjacent angles that lie on the same side of a transversal of two lines and in corresponding positions. Example: / 1 & / 3 are coresponding angles and so are / 2 & / 4 in the diagram. exponent A number that shows how many times a base number is used as a factor. Example: In 3 , the 4 is the exponent, therefore 3 = 3 x 3 x 3 x 3 function A relationship in which each member of the domain is paired with exactly one member of the range. A number of a domain is an input and the related number of the range is an output. Example: hypotenuse The side opposite the right angle in a right triangle. Example: inequality Mathematical sentence that contains or uses one of the symbols <, >, , , or =. Example: k < -3 irrational number A number that can be represented by a nonrepeating, nonterminating decimal. Example: legs The two shorter sides of a right triangle. Either of the two sides that form the right angle of a right triangle. Diagram: like terms Expressions that contain the same variables. Example: 3b + 12b = (3 + 12)b = 15b linear equation Any equation whose graph is a straight line. Example: y = 1/2x + 3 is linear because its graph is a line. multiplicative inverse The reciprocal of a number. Example: 9/4 is the multiplicative inverse of 4/9. Pythagorean Theorem In any right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the legs. a + b = c a + b = c Example: The right triangle shown has leg lengths 3 and 4 and hypotenuse length 5: 3 + 4 = 5 9 + 16 = 25 radical sign The symbol used to indicate a nonnegative square root. rational number Any number you can write as a quotient of two integers a/b, where b is not zero. Examples: 3/5, -8, 8.7, 0.333..., 0, 17/4, -5 3/11. relation A set of ordered pairs. Example: {(0,2), (-3,2), (0,1)} Scientific notation A way of reexpressing a number so that it is written as the product of a number greater than or equal to 1 and less than 10, and a power of 10. Example: 37,000 written as 3.7 x 10 sequence A set of numbers that follow a pattern. Examples: 2, 2.3, 2.34, 2.345,... 3, 6, 9, 12, 15,... significant digits Digits that represent an actual measurement. slope A ratio that represents the tilt of a line (the change in y to the corresponding change in x). Example & Diagram: The slope of the given line is 2/4 or 1/2. square root A number that when multiplied by itself equals the given number. One of the two equal factors of a number. Example: 25 = 5 because 5 = 25 supplementary angles Two angles whose sum of their measures is 180 . Example & Diagram: A & D system of linear equations Two or more linear equations. Example: y = 3x + 1 and y = -2x - 3