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Vocabulary Unit 1

Across
No dimensions, usually represented by a small dot
Two angles whose measures add up to 90 degrees
Points that lie on the same line
An angle that is EXACTLY 90 degrees
Looking for patterns and making conjectures
Two different rays that have the same initial point
Two or more points in common
The initial point of an angle
An example that shows that a conjecture is false
Unproven statement that is based on observations
One of the rays of an angle
Down
An angle less than 90 degrees
Rules that are accepted without proof
An angle greater than 90 degrees and less than 180.
Angles that have the same measure
Line segments that have the same length
Extends in two dimensions. Looks like a tabletop or a wall
An angle that is EXACTLY 180 degrees
Extends in one dimension. Usually represented by a straight line with two arrowheads
Points that lie on the same plane
Two angles whose measures add up to 180 degrees