Angle Congruence and Reasoning with Deductive Reasoning Flashcards
Same Side Interior Angle Postulate
If there two parallel lines are cut by a transversal, then the same side interior angles are supplementary
Corresponding Angles Theorem
If there two parallel lines are cut by a transversal, then the corresponding angles are congruent
Alternate Exterior Angle Theorem
If two parallel lines are cut by a transversal, then the alternate exterior angles are congruent
Same Side Exterior Angle Theorem
If there two parallel lines are cut by a transversal, then the same side exterior angles are supplementary
Alternate Interior Angle Theorem
If there two parallel lines are cut by a transversal, then the alternate exterior angles are congruent
Congruent Supplements Theorem
If two angles are supplementary to the same angle, then they are congruent
Congruent Complements Theorem
If two angles are complementary to the same angle, then they are congruent
Same Side Interior Angle Postulate Converse
If two lines and a transversal form same side interior angles that are supplementary, then the two lines are parallel
Corresponding Angles Theorem Converse
If two lines and a transversal form corresponding angles that are congruent, then the two lines are parallel
Alternate Exterior Angle Theorem Converse
If two lines and a transversal form alternate exterior angles that are congruent, then the two lines are parallel
Same Side Exterior Angle Theorem Converse
If two lines and a transversal form alternate exterior angles that are supplementary, then the two lines are parallel
Alternate Interior Angle Theorem Converse
If two lines and a transversal form alternate interior angles that are congruent, then the two lines are parallel
Reflexive Property of Equality
A=A
Transitive Property of Equality
If a = b and b = c, a = c
Symmetric Property of Equality
if a = b then b = a
Vertical Angle Theorem
Vertical Angles Are Congruent
Linear Pair Postulate
If two angles are a linear pair then they add up to 180 degrees
Theorem about right angles (not called anything specific, write into proof as the full theorem)
All right angles are congruent
Parallel Lines
coplanar lines that do not intersect. II means “is parallel to”
Skew lines
Lines that are non-coplanar (are not parallel and do not intersect)
Parallel Planes
Planes that do not intersect
Transversal
a line that intersects two or more coplanar lines at distinct points