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    Definition:  A fraction A/B where A and/or B are fractions (B nonzero).

    Definition:  Two plane or solid figures are congruent if one can be obtained from the other by rigid motion (a sequence of rotations, reflections, and translations).C

    Definition: (of an angle) less than 90°.

    Definition:  A number expressible in the form a/b where a is a whole number and b is a positive whole number. (The word fraction in these standards always refers to a non-negative number.) See also: rational number.

    Definition:  In the graph of a trigonometric function, the horizontal line halfway between its maximum and minimum values.


    Definition:  Quartiles are the values that divide a list of numbers into quarters.

    Definition:  Two numbers whose sum is 0 are additive inverses of one another. Example: 3/4 and – 3/4 are additive inverses of one another because 3/4 + (– 3/4) = (– 3/4) + 3/4 = 0.

    Definition: The number below the line in a common fraction showing how showing the divisor, for example, 3 in ⅔.

    Definition: A fraction in which the numerator is greater than the denominator, such as 5/4.

    Definition: A method of visually displaying a distribution of data values by using the median, quartiles, and extremes of the data set. A box shows the middle 50% of the data. Denoting the middle term of a series arranged in order of magnitude, or (if there is no middle term) the average of the middle two terms. For example, the median number of the series 55, 62, 76, 85, 93 is 76.