52 terms

7th grade math vocabulary

7th grade math vocab for boot camp
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acute angle
An angle less than 90 degrees
obtuse angle
An angle more than 90 degrees
integers
All whole numbers (both positive and negative) and zero.
supplementary angles
two angles that add up to 180 degrees
complimentary angles
angles that add up to 90 degrees
equilateral
having all sides or faces equal
adjacent
having a common boundary or edge
x-axis
the horizontal number line in a coordinate plane
reciprocal
the flipside of a fraction: the reciprocal of 2/3 is 3/2
double
a number times 2
equation
a number sentence
PEMDAS/order of operations
the correct order in which to solve an equation: working left to right repeatedly: Parentheses, Exponents; then Multiplication or Division; then Addition or Subtraction.
y-axis
the vertical axis on a coordinate plane
ordered pair
A pair of numbers that can be used to locate a point on a coordinate plane
equivalent
equal
prime number
a number that can not be divided by anything but 1 and itself
composite number
a number that can be divided into equal parts; opposite of prime number
circumference
The distance around a circle
similar figures
figures that have the same shape but not necessarily the same size
square root
a number that is multiplied by itself to form a product; the inverse of squaring a number
improper fraction
a fraction whose numerator is larger than the denominator
mixed number
a number made up of a whole number and a fraction
quadrilateral
a four-sided polygon
quadrant
one of four sections of the coordinate plane
simplest form
the form of a fraction when the numerator and denominator have no common factor other than 1
simplify
To change an equation, fraction, or other mathematical expression into its most basic form
variable
a symbol (like x or y) that is used in math to represent a number
percent of change
the amount that a number increases or decreases (changes) stated as a percent
surface area
the sum of the areas of all the faces of a solid (3-dimensional) figure
trapezoid
A quadrilateral with only one pair of parallel sides
proportions
two ratios (fractions) that are equal
diameter
the distance across a circle through its center
radius
The distance from the center of a circle to a point on the circle; half of the diameter
bar graph
a graph that uses horizontal or vertical bars to display data
prism
a solid figure with two parallel, congruent bases
line segment
a part of a line with two endpoints
ray
a part of a line that starts at one endpoint and extends forever
stem and leaf plot
a display of data in which digits with larger place values are "stems" and digits with smaller place values are "leaves"
tree diagram
A diagram used to show the total number of possible outcomes
rational numbers
any number (positive or negative) that can be written as a fraction
expression
the part of a number sentence that combines numbers and operations, but doesn't have an equal sign.
greatest common factor (GCF)
The largest factor that two or more numbers have in common (ex. GCF of 200 and 60 is 20)
prime factorization
breaking down an integer into factors until all the factors are prime
scale model
a model used to represent an object that is too large or too small to be built at actual size
vertex
A point where two or more straight lines meet.
diagonal
a straight line through a figure from one corner to another corner; slanted
horizontal
Going straight across from side to side
vertical
Straight up and down
pi
3.14
box and whisker plot
A graph that displays the highest and lowest quarters of data as whiskers, the middle two quarters of the data as a box, and the median
ascending
sorting from smallest to largest; going up
descending
sorting from largest to smallest; going down