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### 15 Cards in this Set

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 Tranversal (131) a line that intersects 2 or more coplanar lines at different points. Corresponding Angles (131) Two angles that occupy corresponding positions. Alternate Exterior Angles (131) Two angles that lie outside the two lines on opposite sides of the transversal. Alternate Interior Angles (131) Two angles that lie between the two lines on opposite sides of the transversal. Consecutive Interior Angles (131) Two angles that lie between the two lines on the same side of the transversal. aka Same Side Interior Angles Postulate 13: Parallel Postulate (130) 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. Postulate 14: Perpendicular Postulate 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. Theorem 3.1 If two lines intersect to form a linear pair of congruent angles, then the line are perpendicular. Theorem 3.2 If two sides of two adjacent acute angels are perpendicular, the the angles are complementary. Theorem 3.3 If two lines are perpendicular, then they intersect to form four right angles. Postulate 15: Cooresponding Angles Postulate If two parallel lines are cut by a transversal, then the two pairs of corresponding angles are congruent. Theorem 3.4: Alternate Interior Angles If tow parallel lines are cut by a transversal, then the pairs of alternate interior angles are congruent. Theorem 3.5: Consecutive Interior Angles If two parallel lines are cut by a transversal, then the pairs of consecutive interior angles are supplementary. Theorem 3.6: Alternate Exterior Angles If two parallel lines are cut by a transversal,then the pairs of alternate exterior angles are congruent. Theorem 3.7: Perpendicular Transversal If two parallel lines are cut by a transversal, then it is perpendicular to the other.