Across
1
Exact correspondence on both sides
2
Lines that never intersect
5
Comparison of two quantities
6
System of ordered marks for measuring
7
Power to which a number is raised
8
Single numeral from 0 to 9
10
Sum divided by count
Down
1
Collection of distinct elements
2
U-shaped curve of a quadratic function
3
Number divisible only by 1 and itself
4
Three-sided polygon
5
Difference between highest and lowest values
9
Longest side of a right triangle
11
Reference line in a graph