# math definitions

## Terms

undefined, object
copy deck
like terms
terms in which all varibles and their corresponding exponents are the same (coeddicents way be defferent)
mean
the sum divided by the amount
set
collection of objects
circle
the sets of points which are equal distant from a given point, on a plane
parallelogram
a quadrilateral with opposite sides congruent, opposite sides parallel and opposite angles congruent
line symmetry
at least one line can be drawn so that one side is the mirror image of the other
central angle
sides of radii vertex is the center
associative property
for assition and multiplication (grouping can change)
obtuse triangle
triangle with one obtuse angle
whole numbers
{0,1,2,3...}
scalene
nocongruent sides
line
infinitely long straight path, infinitely thine (made up of points)one dimentsion (length)
chord
segment with endpoints on the circle
ray
part of a line with one endpoints
vertical angles
a pair of non-adjacent angles formed bu two intersectin lines
perpendicular
two lines intersect at right angles
regular polygon
a polygon with congruent sides and angles
equalateral
all sides and angles are congruent
intersection
points in common "n"
diameter
chord which passes through the center
1 degree
1/360 of a complete rotation
isosceles trapezoid
isosceles trapezoid with congruent legs
mutually exclusive / disjoint
if two sets have no elements in common (interjection is empty)
real numbers
all raational and irrational numbers
infinite
never ending
the opposite, every real number except zero has a multiplicative inverse (reciprical, fraction)
translation
moves each pointof a figure to its image by rotating it about a fixed point in th plane
point
exact location, infinately small, zero dimensions represented by a .p "point P"
supplementary
a pair of angles that the sum of the measures are 180 degrees
circumference
distanve around a circle
theorem
a mathematical statement which we prove as true
parallel lines
two lines which never intersect and are on the same plane
objects
are called elements
multiplication property
# times zero equals zero
transversal
a line which intersects to given lines in a plane
distributive proberty
a(b+c)=ab+ac
polygon
a closed figure made up of line segments with nointerior reflex angles
axiom
a mathematival statement which we accept as true, without proof
pi
the ratio C/D for any circle
natural numbers
(counting numbers) {1,2,3...}
rectangle
a parallelogram with all congrent angles (all right angles)
complementary
a pair of angles that the sum of the measures are 90 degrees
algebraic expression
two or more algebraic terms that are connected by +/-
skew lines
two lines not on the same plane, which never intersect
perimeter
sum of the lengths of the sides
finite
has an end
rational numbers
any number that can be expressed as a fraction
corresponding
a pair of angles that are on the same side of the transversal, one interior ,and oneexterior, and non-adjacent
range
the difference between teh greatest and smallest number
right triangle
triangle with one right angle
algebra
uses varibles to represent unknown numbers
multiplicative identity
# times one equals #
isosceles
at least two sides and angles
ratio
a comparison of two quantities
mode
most common (can only be three possibilites)
two angles which share a common ray, common vertex, and do not overlap
union
is when the elements in either or both "U"
rate
if two quantities have different unit of measure (not convertable) then the rate of a per b is a/b
irrational
nonterminating, non-repeating decimal
plane
infinitely long, infinitely wide, a flat surface, two dimentions (length, width)
collinear
when two or more points are on the same line
alternate interior angles
a pair of angles that are on opposite sides of the transversal, bothe interior, and non-adjacent
median
"midle" score when listed in increasing or decreasing order
intergers
positive and negative whole mumbers and zero {...-3,-2,-1,0,1,2,3...}
acute triangle
triangle with all acute angle
algebraic term
any product of numbers and varibles
intergers
all whole numbers are their additive inverses
angle
two rays with a common endpoint
length of the segment from the center to any point on the circle
line segment
part of a line, with two endpoints
proportion
is an equality of two ratios
arc
a part of a circl
communative property
for additon and multiplication (order can change)
square
a parallelogram with all congruent sides and angles
rhombus
a parallelogram with all congruent sides
absolute value
of a number is its distance from zero on the number line
congruent
angles are equal degrees in measure, line segments are equal in length
Euclid
discovered the undefined terms "point, line, plane