## unit 4: parallel and perpendicular lines

##### Created by:

monokuro  on March 7, 2012

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# unit 4: parallel and perpendicular lines

 alternate exterior anglesAngles that lie on the exterior of two lines but on opposite sides of the transversal
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#### Definitions

alternate exterior angles Angles that lie on the exterior of two lines but on opposite sides of the transversal
alternate interior angles Angles that lie on the interior of two lines and on opposite sides of the transversal
consecutive interior angles (same-side interior) Angles that lie on the interior of two lines and on same sides of the transversal
corresponding angles Angles that lie on same position on the lines and transversal
parallel lines Coplanar lines that never intersect
point-slope form An equation in the form: y - y-coor = m(x - x-coor) given the a point (x-coor, y-coor) and slope of a line.
skew lines NON-coplanar lines that do NOT intersect
slope For a non-vertical line containing two points on the coordinate system, the ratio of the change in the y-coordinates/ the change in the x-coordinates.
standard form A linear equation in the form Ax + By = C
slope intercept form A linear equation in the form y = mx + b. M is slope and b is the y-coordinate of the y-intercept (0,b)
transversal A line that intersects two or more lines in a plane at different points

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