Term | Definition |
Parallel Lines | Coplanar lines that do not intersect. |
Skew Lines | Non-coplanar lines, are not parallel, and they do intersect. |
Parallel Planes | Planes that do not intersect. |
Transversal | A line that intersect two or more coplanar lines at distinct points. |
Alternate Interior Angles | Nonadjacent interior angles that lie on opposite sides of the transversal. |
Same-side Interior Angles | Interior angles that lie on the same-side of the transversal. |
Corresponding Angles | Angles that lie on the same side of the transversal (t) and in corresponding positions. |
Alternate Exterior Angles | Nonadjacent exterior angles that lie on opposite sides of the transversal. |
Auxiliary Line | Line that you add to a diagram to help explain relationships in proofs. |
Exterior Angle Of A Polygon | Angle formed by a side and an extension of an adjacent side. |
Remote Interior Angles | Two nonadjacent interior angles. |
Slope | measure of a line is the ratio of the vertical change Rise/Run |
Slope-Intercept Form | Equation of a non-vertical line is y = mx + b, where m is the slope and b is the intercept. |
Point-Slope Form | Equation of a non-vertical line is y - y^1 = m(x - x^1), where m is the slope and (x^1,y^1) is a point on the line. |