Across
1
Line crossing from corner to corner
4
Number divisible only by 1 and itself
5
Part of a line with two endpoints
6
Result of raising a number to an exponent
9
The number representing nothing
12
Rectangle with four equal sides
Down
2
Difference between highest and lowest values
3
Line segment connecting two circle points
4
Parts per hundred
5
Collection of distinct elements
7
Repeated addition
8
Reference line in a graph
10
Longest side of a right triangle
11
Mathematical rule or equation