Across
1
Result of raising a number to an exponent
3
Rectangle with four equal sides
4
Difference between highest and lowest values
6
Lines that never intersect
9
Steepness of a line
10
Line crossing from corner to corner
11
Split into equal parts
Down
2
Repeated addition
3
Exact correspondence on both sides
5
The number representing nothing
7
Mathematical statement of equality
8
Parts per hundred
12
Line touching circle at one point