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13 Cards in this Set
- Front
- Back
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Corresponding Angles Postulate
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If two parallel lines are cut by a transversal, then the pairs of corresponding angles are congruent.
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Alternate Interior Angles Theorem
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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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Alternate Exterior Angles Theorem
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If two parallel lines are cut by a transversal, then the two pairs of alternate exterior angles are congruent.
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Same-Side Interior Angles Theorem
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If two parallel lines are cut by a transversal, then the two pairs of same-side interior angles are supplementary.
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Converse of the Alternate Interior Angles Theorem
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If two coplanar lines are cut by a transversal so that a pair of alternate interior angles are congruent, then the two lines are parallel.
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Converse of the Alternate Exterior Angles Theorem
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If two coplanar lines are cut by a transversal so that a pair of alternate exterior angles are congruent, then the two lines are parallel.
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Converse of the Same-Side Interior Angles Theorem
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If two coplanar lines are cut by a transversal so that a pair of same-side interior angles are supplementary, then the two lines are parallel.
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Perpendicular Lines Theorem
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If two intersecting lines form a linear pair of congruent angles, then the two lines are perpendicular.
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Perpendicular Transversal Theorem
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In a plane, if a transversal is perpendicular to one of two parallel lines, then it is perpendicular to the other line.
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Converse of the Perpendicular Transversal Theorem
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If two coplanar lines are perpendicular to the same line, then the two lines are parallel to each other.
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Parallel Lines Theorem
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In a coordinate plane, two non vertical lines are parallel if and only if they have the same slope. Any two vertical lines are parallel.
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Perpendicular Lines Theorem
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In a coordinate plane, two non vertical lines are perpendicular if and only if the product of their slopes is -1. Vertical and horizontal lines are perpendicular.
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Point Slope Form
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y-y,=m(x-x,)
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