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8th Grade Math Cumulative Vocabulary Words

Maintaining mathematical literacy and academic content rigor.
Math Teacher: Mr. Santiago.
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Across
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Angles in a plane that share a common vertex and common side but do not overlap.
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Angles having the same relative position in similar figures.
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Two figures are congruent if one is an image of the other under a translation, a reflection, a rotation, or some combination of these transformations. Put more simply, two figures are congruent if you can slide, flip, or turn one figure so it fits exactly on the other.
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A relationship between two variables in which the value of one variable depends on the value of the other variable. For example, the distance d in miles covered in t hours by a car traveling at 55 mph is given by the equation d=55t . The relationship between the distance and the time is a function, and we say that the distance is a function of the time.
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One of the two variables in a relationship. Its value depends upon or is determined by the other variable called the independent variable.
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Variables that measure characteristics using “words” that represent possible responses within a given category.
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The figure formed by two rays or line segments that have a common vertex and is measured in degrees.
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The number of miles per hour averaged over an entire trip. For instance, if you travel 140 miles in 2 hours, then the average speed is 70 miles per hour.
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A triangle having each angle measure less than 90 degrees.
Down
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A three-dimensional shape with six identical square faces. Also, a right rectangular prism.
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Whole numbers in sequence that follow each other, such as 31, 32, 33 or 52, 53, 54.
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A pair of angles whose measures add to 90 degrees.
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Two numbers, a and b, that satisfy the equation a+b=0 . For example, 3 and −3 are additive inverses, and 12 and −12 are additive inverses.
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A quantity expressed as a number raised to a power.
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Two sides that meet at a vertex.
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A transformation that enlarges or reduces a figure by a scale factor about a center point so that the original figure and its image are similar.
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A three-dimensional shape with two opposite faces that are parallel and congruent circles. The side (lateral surface) is a rectangle that is “wrapped around” the circular faces at the ends.
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If A=s3 , then s is the cube root of A. For example, 2 is the cube root of 8 because 2·2·2=8 . The      ⎯⎯⎯⎯√3 symbol is used to denote the cube root.