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Geometry Def.

TermDefinition
Point Infinitely small location in space
Line Infinitely long, infinitely thin straight path
Plane Infinitely long, infinitely wide flat surface
Line Segment Part of a line with two endpoints
Ray Part of a line with one endpoint
Axiom A (mathematical) statement which we accept as true without proof (because there is NO counterexample)
Collinear Two or more points that lie on a common line
Parrallel Two (or more) lines are parallel if they never intersect AND are on the same plane
Skew Lines Two lines not in the same plane, which never intersect
Angle Two rays with a common endpoint (vertex)
(One) Degree 1/360 of a complete rotation
(Geometric) Intersection (All) points in common
Perpendicular Two lines (or rays, or segments) which intersect at 90 degrees
Adjacent Angles Two angels which share a common ray, vertex and do not overlap
Theorem A mathematical statement which we can prove to be true
Vertical Angles Two non-adjacent angles formed by two intersecting lines
Transversal A line which intersects two given lines in a place
Corresponding Angles 1) On SAME side of transversal, 2) one interior, one exterior, 3) not adjacent
Alternate Interior Angles 1) Opposite sides of the transversal, 2) both interior, 3) not adjacent
Created by: jdg33
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