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postulates, theorems
geometry postulates and theorems parallel lines
| Term | Definition |
|---|---|
| converse | switch the hypothesis and conlcusion |
| converse of the corresponding angles postulate | postulate: if two lines and a transversal form corresponding anglesthat are congruent, then the lines are parallel |
| converse of the alternate interior angles theorem | theorem:if the two lines and a transversal form alt. interior angles that are congruent ,then the the lines are parallel |
| converse of the same side interior angles theorem | if two lines and a transversal form same-side int. angles that are supplementary, then the lines are poarallel |
| converse of the alt. exterior angles theorem | if two lines and a transversal form alt. esterior angles that are congruent , then the two lines are parallel |
| alt. interior angles | non-adjacent interior angles that lie on oppostie side of the transversal alternate: opposite |
| alt. exterior angles | non-adjacent exterior angles that lie on opposite sides of the transversal |
| same-side interior angles | interior angles that lie in the same side of the transversal |
| corresponding angles | angles that lie on the same-side of the transversal and in the same position |
| parallel lines | coplanar liines that do not intersect. the same symbol // means |
| perpendicular lines | lines that intersect and form rigt angles the symbol (an upside down T)means |