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Unit 1
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Point
A location no size, no shape

Line
Made up of points, has no thickness

Line Segment
A portion of a line with 2 end points, named by the end points

Ray
A line that extends indefinently on/end

Plane
A flat surface made up of points that extends indefintently in all directions

Collinear (same line)
Points that lie on the same line

Coplanar (same plane)
Points that lie on the same plane

Congrument Segments
Same size, same shape, segments with same measure

Segment Addition Postulate
If A, B and C are colinear and B is between A and C! AB+BC=AC