3-3 Proving Parallel and Perpendicular Lines Flashcards
1
Q
corresponding angles post. conv.-
A
if 2 angles are cut by a transversal,and corresponding angles are congruent, then the lines are parallel
2
Q
same side interior angle converse
A
if 2 lines are cut by a transversal, and the same side interior angles are supplementary, then the lines are parallel
3
Q
transitive prop. of parallel lines theorem
A
in a plane, is 2 lines are parallel to the same line, then there parallel to the same line.
4
Q
lines perp. to a transversal theorem
A
in a plane if 2 lines are perp. to the same line, then they are parallel to each other.
5
Q
perp. transversal theorem
A
in a plane, if a line is perpendicular to one of the two parallel lines, then its also perpendicular to the other.