###
angle

a figure that is formed by two rays or two line segments that have the same endpoint

###
apex

the vertex of a cone or the vertex where the faces that are not a base of a pyramid meet

###
area

the amount of surface inside a shape

###
array

An arrangement of objects in rows and columns

###
circumference

the distance around a circle, or its perimeter

###
congruent

two figures that have the same shape and same size

###
degree

a unit of measure for angles and for temperature

###
diameter

a line segment that goes through the center of a circle and has endpoints on the circle

###
estimate

an answer that is close to an exact answer

###
fahrenheit

the temperature scale used in the U.S. customary system

###
geometry

the study of shapes

###
intersect

to meet or cross

###
line

a straight path that goes on forever in both directions

###
maximum

the largest number in a set of data

###
mean

an average number in a set of data

###
median

the middle number in a set of data, when the numbers are put in order from smallest to largest, or largest to smallest

###
minimum

the smallest number in a set of data

###
mode

the number or value that occurs most often in a set of data

###
parallel

always the same distance apart, and never meeting or crossing each other

###
parallelogram

a 4-sided polygon that has 2 pairs of parallel sides that are the same length

###
polygon

a closed figure on a flat surface that is made up of line segments joined end to end.

###
quadrangle

a polygon that has four sides and four angles

###
quadrilateral

a polygon that has four sides and four angles

###
radius

a line segment that goes from the center of a circle to any point on the circle

###
range

the difference between the biggest (maximum) and the smallest (minimum) numbers in a set of data

###
rectangle

a parallelogram whose corners are all right angles

###
sphere

a solid with a curved surface that looks like a ball or a globe

###
trapezoid

a 4-sided polygon with exactly one pair of parallel sides

###
triangle

a polygon that has three sides and three angles

###
vertex

the point where the rays of an angle or the sides of a polygon meet

###
perimeter

the distance around a shape

### Please allow access to your computer’s microphone to use Voice Recording.

## We can’t access your microphone!

### Click the icon above to update your browser permissions above and try again

Example:

### Reload the page to try again!

Reload

## Press Cmd-0 to reset your zoom

## Press Ctrl-0 to reset your zoom

### It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

## Your microphone is muted

### For help fixing this issue, see this FAQ.

##### NEW! Voice Recording

Click the mic to start.