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19 Cards in this Set

  • Front
  • Back
Linear Pair Postulate
If two angles form a linear pair, then they are supplementary. i.e the sum of their measures is 180 degrees
Transitive Property
If a=b and b=c then a=c
Congruent Supplements Theorem
if two angles are supplementary to the same angle or to congruent angles then they are congruent
Segment Addition Postulate
If B is between A and C, then Ab+BC=AC
If two lines are perpendicular...
...then they intersect to form 4 right angles
Symmetric Property
If a=b then b=a
Alternate Interior Angles Theorem
If two parallel lines are cut by a trasversal then the pairs of alternate interior angles are congruent
Perpendicular Transversal Theorem
If a transversal is perpendicular to one or two parallel lines, then it is perpendicular to the second
Consecutive Interior Angles Converse
If two lines are cut by a transversal so that consecutive interior angles are supplementary then the lines are parallel
Alternate Exterior Angles Converse
Theorem= If two lines are cut by a transversal so that alternate exterior angles are congruent then the lines are parallel
Alternate Exterior Angles Theorem
If two parallel lines are cut by a transversal, then the pairs of alternate exterior angles are congruent.
Congruent Complements Theorem
If two angels are complementary to the same angle or to congruent angles, then they are congruent
Corresponding Angles Converse
If two lines are cut by a transversal so that corresponding angles are congruent then the lines are parallel
Corresponding Angles Postulate
If two parallel lines are cut by a transversal then the pairs of corresponding angles are congruent
COnsecutive Interior Angles Theorem
If two lines are cut by a transversal then the pairs of consecutive interior angles are supplementary
Property of Perpendicular Lines
If two coplanar lines are perpendicular to the same line then they are prallel to eachother.
If two disinct lines intersect...
...then their interesection is exactly one point
Reflexiver Property
a=a
Transitivity of Parallel Lines
If two lines are parallel to the same line then they are parallel to eachother