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Geometry Chapter 1
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Gravity
Key Concepts:
Terms in this set (18)
Points
a position or place (no size)
Line
unlimited string of points that extends infinitely in 2 directions
Plane
infinite, flat, 2 dimensional
collinear pts
points on the same line
coplaner pts
points on the same plane
Intersection
set of all points 2 figures have in common
segment
a part od a line with 2 end points
ray
part of a line with one end point
midpoint def
if m is the mid point of AB then, M is on AB & AM = MB
Congruent
figures with the exact size and shape
congruent segments
same lenght
bisector of a segment
any line, ray segment that intersects a segment at its midpoint
Angle
a figure formed by 2 rays with a common end point
Angle Bisector
XB is the angle bisector of <ABC if M<ABX = <XBC
Adjacent Angles
2 angles with a common vortex and a common side but do not share interior space.
postulate
a statement that is accepted as true without proof
Segment addition Post
If B is between A & C then AB + BC= AC
Angle addition post
if C lies in the interior of <ABD
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