###
ratio

a comparison of 2 quantities using divison

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rational number

A number that can be written as a/b where a and b are integers, but b is not equal to 0.

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reflection

A transformation that "flips" a figure over a mirror or reflection line.

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reapeating decimal

a decimal that has a pattern that repeats

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rhombus

a parallelogram with four equal sides

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rotation

a transformation in which a figure turns around a point called the center of rotation

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sales tax

an additional amount of money charged on items by governments to raise money

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sample

a part of the population

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scale

a ratio that compares the measurements of a drawing or model to the actual measurements

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scale drawing

a porpotional 3D drawing of an object

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scale factor

scale with out units

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similar figures

figures that have the same shape but not necessarily the same size

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slope

ratio of change of y(the rise) to change in the x(the run) between any 2 points on a line

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stem

digit or digits on the left of a stem-and-leaf plot

###
stem-and-leaf plot

type of data display that uses the digits of data values to organize a set

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surface area of a prism

sum of the areas of all the faces of the prism

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terminating decimal

a decimal that ends and does not keep going

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theoretical probablity

the ratio of a number of equaly likely outcomes in an event to the total number of possible outcomes

###
transformation

changing a figure into another figure

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translation

transformation in which a figure slides but does not turn. Every point of the figure moves the same direction and the same distance

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trapezoid

a quadrilateral with exactly one pair of parallel sides

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unit rate

a rate with a denominator of 1

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variable

a symbol usually a letter that represents one or more numbers

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variable term

a term that has a variable

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vertex of a solid

a point where the edges of a solid meet

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vertical face

angles opposite of each other when 2 lines intersect. NOT congruent

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volume

the measure of the amount a 3-dimensional figureoccupies

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x-axis

the horizontal number line in a coordinate plane

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x-coordinate

the first number in an ordered pair that tells the distance to move right or left

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y-axis

the vertical axis on a coordinate plane

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y-coordinate

the second number in an ordered pair that tells the distance to move up or down

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