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34 Cards in this Set
 Front
 Back
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 onedementional location


Line

a onedementional 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
