44 terms

lsowatskyTEACHER

absolute value

distance from the origin

mean

average; add up all data and divide by the number of data

median

the MIDDLE number when data is ordered from least to greatest

mode

data that occurs MOST often

range

the difference between the highest and lowest scores of the data

frequency table

a way to present data with tally marks

stem and leaf plot

a way to present data with stem as higher digit place value and leaves as lower digit place value

circle graph

a way to present data using percentages

perimeter

the distance around any closed figure

area

The number of square units required to cover a surface; measurement of space inside a closed figure

circumference

distance around a circle

composite figure

figure composed of two or more shapes combined

center of circle

point in the center of circle

diameter

A straight line passing from side to side through the center of a circle.

radius

A straight line from the center to the circumference of a circle or sphere.

semicircle

half of a circle

acute triangle

A triangle with three acute angles.

angle

A figure formed by two rays with a common endpoint

complementary angles

two angles whose sum is 90 degrees

congruent

Having the same measure

equilateral

all sides the same measure

equiangular

all angles have the same measure

parallel lines

lines that never intersect

parallelogram

A quadrilateral with opposite sides parallel and congruent and opposite angles are congruent

perpendicular lines

lines that intersect at 90 degree angle

polygon

A closed plane figure made up of line segments

quadrilateral

A four-sided polygon.

reflection

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

regular polygon

a polygon that is both equilateral and equiangular; all sides and angles congruent

right triangle

a triangle with one right angle

rotation

rotate figure around a point

similar figures

figures that are proportional, but not necessarily the same size

supplementary angles

Two angles whose sum is 180 degrees

translation

slide a figure to a new place

vertex

the common endpoint of an angle

coefficient

A number multiplied by a variable.

equals sign

symbol that shows two expression equal each other

equation

a math problem with an equal sign

inverse operation

operations that undo each other

solution

value of the variable that makes an equation true; the answer

solve

to replace a variable with a value that results in a true sentence; process to find the solution

coordinate plane

formed by two lines that intersect at a 90 degree angle forming 4 quadrants

ordered pair

A pair of numbers that can be used to locate a point on a coordinate plane

right angle

an angle that measures 90 degrees