Across
1
Result of raising a number to an exponent
2
Line crossing from corner to corner
5
Steepness of a line
6
Single numeral from 0 to 9
9
The number representing nothing
12
Lines that never intersect
14
Reference line in a graph
Down
2
Split into equal parts
3
Proven mathematical statement
4
Part of a circle's circumference
7
Space between two intersecting lines
8
Sum divided by count
10
Comparison of two quantities
11
Repeated addition
13
Round shape with all points equidistant