Across
1
Number less than zero
4
U-shaped curve of a quadratic function
6
Proven mathematical statement
7
Split into equal parts
8
Mathematical statement of equality
9
Repeated addition
Down
2
Parts per hundred
3
Lines that never intersect
4
Number greater than zero
5
Round shape with all points equidistant
10
Divisible by two
11
Rectangular array of numbers