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Vocabulary Unit 1

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2
3
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7
8
9
10
11
12
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19
20
Across
3
No dimensions, usually represented by a small dot
5
Two angles whose measures add up to 90 degrees
7
Points that lie on the same line
8
An angle that is EXACTLY 90 degrees
13
Looking for patterns and making conjectures
15
Two different rays that have the same initial point
16
Two or more points in common
17
The initial point of an angle
18
An example that shows that a conjecture is false
19
Unproven statement that is based on observations
20
One of the rays of an angle
Down
1
An angle less than 90 degrees
2
Rules that are accepted without proof
4
An angle greater than 90 degrees and less than 180.
5
Angles that have the same measure
6
Line segments that have the same length
9
Extends in two dimensions. Looks like a tabletop or a wall
10
An angle that is EXACTLY 180 degrees
11
Extends in one dimension. Usually represented by a straight line with two arrowheads
12
Points that lie on the same plane
14
Two angles whose measures add up to 180 degrees