Across
1
Lines that never intersect
5
Space between two intersecting lines
6
Round shape with all points equidistant
7
Mathematical rule or equation
8
Single numeral from 0 to 9
10
Number less than zero
Down
2
Rectangular array of numbers
3
U-shaped curve of a quadratic function
4
Split into equal parts
9
Proven mathematical statement
11
Line touching circle at one point
12
Part of a whole number