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### 34 Cards in this Set

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 Geometry the study of shapes Postulate an accepted statement of fact Conjecture an educated guess made from looking at past experiences Theorem Something proven to be true Inductive Reasoning reaching conclusions based on a pattern of specific examples or past events Point a one-dementional location Line a one-dementional seris of points that extends in both directions forever Line Segment a piece of a line Ray a part of a line with one endpoint going in one direction from that endpoint Collinear Points points that lie on the same line Coplaner points that lie on the same plane Plane a flat surface that extends in all directions without end and has no thickness Opposite Rays two collinear rays with the same end point that together form a line Space the set of all points Intersecting lines lines that cross each other and they meet at one point and only one point Parallel lines coplanar lines that never meet or intersect Skew Lines lines taht are on different planes, so they can not intersect Intersecting planes planes that cross each other and meet in a line Parallel planes planes that never meet and are parallel to each other congruent two shapes that have the exact same measures Angle formed by 2 rays with the same endpoint (the vertex) Acute angle an angle that has a measure of less tahn 90 degrees right angle an angle that has the measure of exactly 90 degress obtuse angle an angle that has a measure of more than 90 degress but less than 180 degress Straight angle an angle that has a measure of 180 degress Midpoint the point that divides the segment into two congruent segments Bisector a line, plane, segment, of ray that cuts something in hafe perpendicular lines lines that insect to form right angles Perpendicular bisector a line, plane, segment, of ray that cuts something in hafe perpendicularily (into 4 right angles) Deductive reasoning a process of reasoning logically from given facts to a conclusion vertical Angles Angles whose sides are on opposite rays (they are always congurent and "pointing" and each other) Adjacent angles two coplner angles with a common side, a common vertez, and no common interior parts (two angles that are next to one another) Complimentarty Angles two angles of whose sum measures 90 degrees Supplementary Angles two angles of whose sum measures 180 degress