Details Title: *PROOF* & my troubles appear!! Description: proofs that i've "learned" thus far in GEOMETRY!!! Total Flash Cards: 18 Created: 11/03/2005 15:59:23		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Mathematics Flashcards
Cards in this set: Term Congruent Supplements Theorem Definition If 2 angles are supplementary to the same angle or to congruent angles, then they are congruent to each other. Term Vertical Angles Theorem Definition Vertical angles are congruent. Term Right Angle Congruence Theorem Definition All right angles are congruent. Term Angle Addition Property Definition If a = b, then a + c = b + c Term Linear Pair Postulate Definition If two angles form a linear pair, then they are supplementary. Term Perpenicular Postulate Definition If there is a line and a point not on the line, then there is exactly one line through the point perpendicular to the given line. Term Parallel Postulate Definition If there is a line and a point not on the line, then there is exactly one line through the point parallel to the given line. Term Theorem 3.1 Definition If two lines intersect to form a linear pair of congruent angles, then the lines are perpendicular. Term Theorem 3.2 Definition If two sides of two adjacent acute angles are perpendicular, then the angles are complementary. and the overall angle is a right angle. Term Theorem 3.3 Definition If two lines are perpendicular, then they intersect to form four right angles. Term Definition of Vertical Angles Definition Two angles whose sides form two pairs of opposite rays. Term Definition of Right Angles Definition An angle with a measure of 90 degrees Term Alternate Interior Angles Theorem (basically same for consecutive. corresponding...etc) Definition If two parallel lines are cut by a transversal, then the pairs of alternate interior angles are congruent. Term Perpendicular Transversal Definition If a transversal is perpendicular to oneof two parallel lines, then it is perpendicular to the other. Term Alternate Interior Angles CONVERSE Definition If two lines are cut by a transversal so that the alternate interior angles are congruent, then the two lines are parallel. Term Theorem 3.11 Definition If two lines are parallel to the same line, they are parallel to each other. Term Theorem 3.12 Definition In a plane, if two lines are perpendicular to the same line, then the two lines are PARALLEL to each other. Term Slopes of Perpendicular Lines Postulate Definition In a coordinate plane, two nonvertical lines are perpendicular if and only if the product of their slopes is -1. Vertical and horizontal lines are perpendicular.