perimeter

the distance around a shape

area

the space inside a shape

factor

A number that is multiplied by another number to get a product

multiple

the product of a number with another number (ex:"36 is a multiple of 9")

ordered pair

A pair of numbers, (x, y), that locate a point on a coordinate plane.

point

an exact location (dot) on a coordinate plane

coordinate plane

A plane that is divided into four regions by a horizontal line called the x-axis and a vertical line called the y-axis.

volume

the amount of space occupied by an object

greatest common factor (GCF)

The largest factor that 2 or more numbers have in common.

least common multiple (LCM)

The smallest number, other than zero, that is a multiple of two or more given numbers; The LCM of 10 and 18 is 90.

coordinates

Ordered pairs that identify points on a coordinate plane. (x,y)

horizontal

straight across from side to side

vertical

straight up and down

diagonal

a straight line from one corner to another corner

x-axis

horizontal line on a coordinate plane

y-axis

vertical line on a coordinate plane

polygon

a closed plane figure (shape) made up of line segments

exponent

a number that shows repeated multiplication; shows how many times a number is to be multiplied with itself

positive number

a number greater than zero

negative number

a number less than zero

numerator

the dividend (top number) of a fraction

denominator

the divisor (bottom number) of a fraction

equivalent fraction

different fractions that are equal in value

product

the answer in a multiplication problem

quotient

the answer to a division problem

sum

the whole amount; the answer to an addition problem

elapsed time

The difference between a starting time and an ending time; an amount of time that has passed

equilateral

having all sides or faces equal

mixed number

a number made up of a whole number and a fraction

improper fraction

a fraction whose numerator is larger than the denominator

integer

a positive or negative number, including zero

quadrilateral

a four-sided polygon

quadrant

one of four sections into which the coordinate plane is divided

factoring/prime factorization

breaking down a number until all of the factors are prime

factor tree

a diagram showing the prime factorization of a number

percent

a ratio that compares a number to 100; out of 100

diameter

the distance across a circle through its center

radius

The distance from the center of a circle to any point on the circle; half the diameter

acute angle

An angle less than 90 degrees

obtuse angle

An angle more than 90 degrees

straight angle

an angle that measures 180 degrees

right angle

an angle that measures 90 degrees

difference

the answer to a subtraction problem

parallel

lying in the same direction and always the same distance apart; lines that will never intersect

perpendicular

two lines that intersect to form right angles