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### 33 Cards in this Set

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 natural #s {1, 2, 3 ...} counting #s whole natural #s and 0 integers whole #s & their opposites {....-3,-2,-1,0,1,2,3.....} rational any # that can be written in form of fraction irrational any # that can NOT be written in form of fraction real all irrational and rational #s What is the formula for area of a rectangle? A = L * W What is the formula for area of a triangle? A = 1/2 B * H Congruent All sides and angles are the same - same size, same shape Order of Operations PEMDAS - Parentheses, Exponents, Multiplication, Division, Addition, Subtraction proportion equation that states 2 ratios (fractions) are equal example 1/2=50/100 expanded form 2,495 = 2,000 + 400 + 90 + 5 mixed numbers A number that consists of a whole number part and a fractional part. Example: 1 1/3 digits any one of the following ten numerical symbols: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. origin (0,0) x-axis horizontal number line y-axis vertical number line ordered pair (x,y) terminating decimal A decimal with a finite number of digits. repeating decimal A decimal in which a digit or a set of digits repeat infinitely. range In statistics, the difference between the largest and smallest values in a sample. prime number A whole number greater than 1 whose only factors are 1 and itself. composite number A number exactly divisible by at least one whole number other than itself and 1. similarity Having the same shape, but not necessarily the same size. mode The number of element that occurs most frequently in a set of data. median The middle number in an ordered set of numbers. What is the formula for area of a circle? "Pi r squared" What is the formula for circumference of a circle? Pi x D Complementary angles Add up to 90 degrees supplementary angles Add up to 180 degrees probability the number of chances divided by the number of choices what are the factors of 15 1, 3, 5 what are the multiples of 6 6, 12, 18, 24...