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