•
###
parallel lines

Two lines that are in the same plane but do not intersect

•
###
skew lines

Two lines that are not in the same plane and do not intersect

•
###
slope

The ratio of vertical change (rise) to horizontal change (run) between any two points on a nonvertical line

•
###
transversal

A line that intersects two or more coplanar lines at different points

•
###
slope-intercept form

The general form of a linear equation: y=mx+b

•
###
standard form

Ax + By=C where A and B are not both zero

###
corresponding angles

Two angles that are in the SAME CORNER or CORRESPONDING positions. (Shown above with angles 4 and 5 and again with angles 3 and 6.)

###
alternate interior angles

Two angles that lie BETWEEN the two lines and on OPPOSITE SIDES of the transversal. (Shown above with angles 4 and 5 and again with angles 3 and 6.)

###
consecutive interior angles

Two angles that lie BETWEEN the two lines and on the SAME SIDE of the transversal. (Shown above as angles 4 and 6 and again with angles 3 and 5)

###
alternate exterior angles

Two angles that lie OUTSIDE of the two lines and on OPPOSITE SIDES of the transversal. (Shown above as angles 2 and 7 and again with angles 1 and 8.)

### 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 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.