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# postulates, theorems

### geometry postulates and theorems parallel lines

TermDefinition
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
Created by: irma sorto