### math

 1 2 3 4 5 6 7 8 9 10 11 12 13

Across
2.the common point of a ray or an angle
4.a location in spac. it has no side
7.its form by 2 rays with the same endpoint it is called the vertex
9.an angle which is 90*; the sides are perpendicular to each other
12.less that 90*; but more than 0*
13.angle which is 90*;their lines are perpendicular to each other
Down
1.2 lines that intersect; they make 4 90* angle
3.a vertex+ a line; name its endpoint first
5.lines that aren't in the same plane. they do not intersect and they aren't parallel
6.2 lines that lie in the same plane; dont intersect at all
8.it's part of a line, it has exactly 2 endpoints
10.is a flat surface and its 2 dimensional its thick and has no end
11.a line has multiple points that extend in 2 directions without end

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