###
Cartesian coordinate system

a method of locating points in the plane that uses pairs of numbers denoting distances along two fixed intersecting number lines, called axes

###
centimeter

Metric unit of measure that equals 10 millimeters

###
chord

a line segment whose endpoints are on a circle

###
circle

a planar geometric figure in which every point on the figure is the same distance from a point at the center

###
circumference

the distance around a circle, also called the perimeter of the circle

###
coefficient

any factor or any product of factors of a product

###
commutative property

a property of real numbers that states that for any real numbers a and b, a + b = b + a and a x b = b x a

###
complex fraction

a fraction whose numerator or denominator (or both) contains a fraction

###
concave polygon

a polygon in which one or more interior angles have a measure greater than 180 degrees

###
conditional equation

an equation whose truth or falsity depends on the numbers used to replace the variables in the equation

### 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.