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### 20 Cards in this Set

• Front
• Back
 Midpoint The point that divides a segment into two congruent segments Supplementary Angles Two angles whose measures have a sum of 180 Segment Bisector A line that divides a segment into two congruent segments Acute Angle An angle whose measure is less than 90 Angle Bisector A ray that divides an angle into two congruent angles Linear Pair the two angles formed by the endpoint of a ray when the endpoint falls on a line; tow adjacent angles whose noncommon sides are opposite rays; two supplementary angles that reside on a line Right Angle An angle with a measure of 90 Complementary angles Two angles whose measure have a sum of 90 Perpendicular Lines intercept to form right angles Obtuse Angle An angle whose meausure is greater than 90 and less than 180 Perpendicular Bisector A line that is perpendicular to a segment at its midpoint Coplanar Lying in the same plane Ray A part of a line that starts at a point and extends infedentely in one direction Endpoints A point at the end of a segment or the starting of a ray Postulate A statement that is accepted true without proof Concurrent Lines litterally "running together; of three of more lines interacting at a single point Segment A part of a line that begins at one point and ends at another; a segment of a line has two endpoints Congruent The relationship between figures having the same size and shape; congruent segments are segments that match exactly Undefined Terms Point, Lines, and Plane; because they are so basic they are not defined by other figures Vertex A point where the edges of a figure intercect; plural - vertices