# Math Vocab 2

## 99 terms

### keep change change (KCC):

KEEP the sign of the first number CHANGE subtraction to addition CHANGE the sign of the second number *this is for SUBTRACTION only

### common denominator

A denominator that is the same in two or more fractions.

Any number added to its negative will equal zero...example -8 + 8 = 0

### prime factorization

Breaking down a composite number until all of the factors are prime

### greatest common factor

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

### probability

chance that something will happen

### prime numbers

Divisible by 1 or itself

### arithmetic sequence

a sequence in which each term is found by adding the same number to the previous term

### simplest form

The lowest form of a fraction.

### least common denominator

the least common multiple of the denominators of the fractions

### reflection

A transformation that "flips" a figure over a mirror or reflection line.

### two-step equation

an equation having two different operations

### parallelogram

a quadrilateral whose opposite sides are both parallel and equal in length

### ordered pair

A pair of numbers that give the location of a point on a x and y grid. for example graph (3, 2)

### one-step equation

an equation that requires only one step to solve...one operation

### origin:

the point (0,0) where the x-axis and the y-axis intersect in a coordinate plane

### quotient:

the answer to a division problem

### absolute value:

The distance a number is from zero on a number line. ALWAYS POSITIVE

### integers:

Negative or positive whole number

subtraction

### lower extreme:

The smallest number in a data set (box & whisker).

### interquartile range:

The difference between the upper and lower quartiles.

### mode:

The number that occurs most often in a set of data

### less than:

switch and subtract

### x-axis:

the horizontal axis...left to right

### stem:

the greatest place value common to all the data that is written to the left of the line in a stem-and-leaf-plot

### y-axis:

the vertical axis on a coordinate plane...top to bottom

### inequalities:

a mathematical sentence involving <, >, or = plus < or >

### separated:

to divide into different parts or sections

### expression:

a group of symbols that make a mathematical statement....example 8 + 7

### product:

multiplication. For example the product of 2 and 3 is 6.

### difference:

the answer to a subtraction problem

### cluster:

a grouping of a number of similar things

multiply

### leaf

the second greatest place value of data in a stem and leaf plot

### equations:

a statement that two expressions are equivalent. For example, 3 x 9 = 27 and 8+x=10

### Ratio:

a comparison of two numbers by division

### outlier:

Any data point that sticks out. NOT all data sets have one.

### median:

The middle number in a set of numbers that are listed in order

### rate:

A ratio of two numbers measured in different units.

### mean:

the arithmetic average of a distribution, obtained by adding the scores and then dividing by the number of scores

### range:

subtract the smallest from the biggest number in the data

### total:

adding all the numbers to find the total

### interval:

the difference between two numbers on the scale

### scale:

Includes all numbers

### perimeter:

The distance around a figure

### area:

the space inside a shape

### Order of operations:

the order in which operations in an expression to be evaluated are carried out. 1. parentheses 2. exponets 3. multiplication and divison 4. addition and subtraction

solve

### variable:

a letter or other symbol that represents a number

### unit rate:

a rate where the comparison is to one unit...example 99 cents per egg

### Multiples:

numbers you say when you skip count. Multiples of 2 are: 2,4,6,8,...

### upper extreme:

the largest number of a set of data

### upper quartile:

The median of the upper half of a set of data.

### Substitute:

replace, To put a number in place of a variable

### lower quartile:

The median of the lower half of data (box & whisker).

### factors:

Numbers that are multiplied together to get a product ex. factors of 52 are 2, 4, 13, and 26

### percent:

a ratio that compares a number to 100.

### rotational symmetry:

The ability of a figure to be rotated less than a full circle and exactly match its original image

### triangle:

a three-sided polygon

### trapezoid:

a quadrilateral with exactly one pair of parallel sides

### supplementary angle:

When the sum of the measures of a pair of angles add up to 180°

### sss congruence:

when three sides of one triangle are congruent to three sides of another triangle

### transversal:

a line that intersects two or more lines

### vertical angles:

two angles whose sides form two pairs of opposite rays

### similar triangles:

Similar triangles have the same shape: corresponding angles are equal and corresponding sides are proportional

a four-sided polygon

### Right triangle:

a triangle with 1 right angle

### line symmetry:

a line that divides a figure into 2 halves that match exactly when the figure is folded on that line

### parallel lines:

lines in the same plane that never intersect

### polygon:

a flat shape with many straight sides and angles

### rhombus:

a parallelogram with four equal sides

### SAS congruence:

sides, 1 included angle

### isosceles:

triangle with two congruent sides....third side is isolated

### obtuse:

measuring between 90 and 180 degrees

### perpendicular:

intersecting at or forming right angles

### rectangle:

A quadrilateral in which the opposite sides are parallel, all angles are 90 degrees

### square:

A quadrilateral with 4 sides that are equal and has all 90 degree angles

### ASA congruence:

2 angles 1 included side...all equal

### Congruent triangles:

2 triangles are congruent if and only if all pairs of corresponding sides and angles are congruent

### equilateral:

all sides congruent

### alternate interior angles:

angles are on opposite sides of the transversal and on the inside of the given lines

### complementary angles:

Two angles whose sum is 90 degrees

### corresponding angles:

angles in the same place on different lines

### alternate exterior angles:

Angles that lie outside a pair of lines and on opposite sides of a transversal.

### acute:

an angle that is less than 90 degrees

### rotation:

the act of rotating as if on an axis

### composite numbers:

a whole number greater than 1 that has more than two factors

### geometric sequence:

a sequence in which each term is found by multiplying the previous term by the same number

### transformations:

movements of geometric figures

### positive integers:

numbers greater than zero

### negative integers:

numbers less than zero

### keep change flip (KCF):

keep the first fraction, change division to multiplication, flip the second fraction... use when dividing fractions

### least common multiple:

The smallest multiple (other than zero) that two or more numbers have in common.

### translation:

A transformation that "slides" each point of a figure the same distance in the same direction.

### opposites:

two numbers that have the same absolute value but have different signs