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Academic vocabulary

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ratio
a comparison of 2 quantities using divison
rational number
A number that can be written as a/b where a and b are integers, but b is not equal to 0.
reflection
A transformation that "flips" a figure over a mirror or reflection line.
reapeating decimal
a decimal that has a pattern that repeats
rhombus
a parallelogram with four equal sides
rotation
a transformation in which a figure turns around a point called the center of rotation
sales tax
an additional amount of money charged on items by governments to raise money
sample
a part of the population
scale
a ratio that compares the measurements of a drawing or model to the actual measurements
scale drawing
a porpotional 3D drawing of an object
scale factor
scale with out units
similar figures
figures that have the same shape but not necessarily the same size
slope
ratio of change of y(the rise) to change in the x(the run) between any 2 points on a line
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
surface area of a prism
sum of the areas of all the faces of the prism
terminating decimal
a decimal that ends and does not keep going
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
translation
transformation in which a figure slides but does not turn. Every point of the figure moves the same direction and the same distance
trapezoid
a quadrilateral with exactly one pair of parallel sides
unit rate
a rate with a denominator of 1
variable
a symbol usually a letter that represents one or more numbers
variable term
a term that has a variable
vertex of a solid
a point where the edges of a solid meet
vertical face
angles opposite of each other when 2 lines intersect. NOT congruent
volume
the measure of the amount a 3-dimensional figureoccupies
x-axis
the horizontal number line in a coordinate plane
x-coordinate
the first number in an ordered pair that tells the distance to move right or left
y-axis
the vertical axis on a coordinate plane
y-coordinate
the second number in an ordered pair that tells the distance to move up or down