Across
1
Lines that never intersect
3
Single numeral from 0 to 9
5
Mathematical rule or equation
6
Line segment connecting two circle points
9
Math using letters for unknown values
11
Number less than zero
Down
2
Number with digits after a point
3
Split into equal parts
4
Line crossing from corner to corner
7
Longest side of a right triangle
8
Parts per hundred
10
Line touching circle at one point