Across
1
Rectangular array of numbers
4
Number less than zero
6
Divisible by two
10
Reference line in a graph
11
Line segment connecting two circle points
Down
2
Space between two intersecting lines
3
Corner point of a polygon
5
Longest side of a right triangle
7
Math using letters for unknown values
8
Number divisible only by 1 and itself
9
Symbol representing unknown value