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13 Cards in this Set
- Front
- Back
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If two lines intersect to form a linear pair of congruent <'s then they are...
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perpendicular
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alternate interior angle thm states...
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if two parallel lines are cut by a transversal then the pairs of alternate interior angles are congruent.
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consecutive interior angles thm...
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if two parallel lines are cut by a transversal then the pairs of consecutive interior angles are congruent.
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alternate exterior angles thm...
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if two parallel lines are cut by a transversal then the pairs of alternate ext. <'s are congruent
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perpendicular transversal thm..
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if a transversal is perpendicular of two parallel lines, then it is perpendicular to the other line.
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corresponding angles converse thm...
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if two lines are cut by transversal so that corresponding angle's are ~= then the lines are paralles.
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alternate interior angles converse thm..
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if two lines are cut by a transversal so that alternate interior angles are =~ then teh lines are parallel.
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consecutive int < converse.
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if 2 lines are cut by a transversal so that consecutive int. < are supplementary then the lines are parallel.
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alt ext. < converse.
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IF 2 lines are cut by a transversal so that alt. ext. < are =~ then the lines are parallel.
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if there are 3 lines, and two lines are parallel to the same line then....
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then they are parallel to eachother.
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in a plane, if two lines are perp to the same line tehn they are...
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parallel to eachother..
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slopes of parallel lines- post 17
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in a coordinate plane two lines are parallel if and only if the have the same slope.
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post 18- slopes of perp lines.
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in a coordinate plane two lines are parallel if and only if the product of their slopes is -1. (opposite reciprical)
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