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acute triangle

triangle with all angles less than 90 degrees

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algebraic expression

numbers, symbols, and variables

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area

space inside a 2D figure

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bar graph

uses bars to compare data

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base

the bottom of a figure

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circumference

distance around a circle

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congruent

same size and shape

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cubed

the third power (exponent of 3)

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denominator

bottom of fraction

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diameter

distance across a circle

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dilation

a larger or smaller version of a figure

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equation

a math sentence with an = sign

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equilateral triangle

triangle where all sides are equal length

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equivalent fractions

two equal fractions

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experimental probability

chances based on results of experiment

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exponent

tells how many times to multiply a number

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expression

collection of numbers, symbols, and/or variables

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factor

a number that can be multiplied to make another number

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frequency table

uses tallys to record how often something occurs

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GCF

greatest common factor

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histogram

uses bars to compare intervals of numbers

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inequality

one expression in greater than or less than another

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integers

positive whole numbers and opposites

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isosceles triangle

two sides are the same

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LCM

least common multiple - least common number that two numbers are factors of

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line graph

best type of graph for changes over time

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line plot

uses x's to show how often a data item occurs

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mean

the average of a group of numbers - add numbers and divide by how many numbers

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median

the middle number in a set of numbers

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mode

the most common in a set of numbers

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numerator

the top of a fraction

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obtuse triangle

a triangle with one angle larger than 90 degrees

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order of operations

parenthesis, exponents, multiply and divide, add and subtract

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outlier

a value that is much greater or much less than the rest of the numbers

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perpendicular

intersect and form a right angle

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parallelogram

quadrilateral with 2 pairs of parallel sides

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percent

a ratio out of 100

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perimeter

the distance around a polygon

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polygon

closed figure made of at least 3 line segments

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prime factorization

writing composite numbers and product of primes

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prime number

number that has only 2 factors (1 and itself)

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probability

measuring how likely something is to occur

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proportion

2 equal ratios

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quadrilateral

having 4 sides

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quotient

the answer to a division problem

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radius

halfway across circle; from center to edge of circle

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range

highest value minus lowest value

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ratio

comparing 2 numbers by division

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reflection

a mirror image of a figure

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right triangle

triangle with a right angle

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rotation

turning a figure around a point

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rule

a procedure for creating a pattern in a series of numbers

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scalene triangle

all sides different length in a triangle

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sector

a part of a circle

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similar figures

same shape, but a larger or smaller version; sides form a proportion

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squared

number to the second power (times itself)

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surface area

area of the outside of a 3D figure

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theoretical probability

what should happen based on possible outcomes

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translation

moving (or sliding) a figure along a straight path

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trial

performing an experiment

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variable

letter used to represent an unknown quantity

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volume

space inside a 3D figure

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vertex

corner of a 2D or 3D figure where 2 lines meet

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