Across
1
Reference line in a graph
3
Math using letters for unknown values
4
Result of raising a number to an exponent
5
Line crossing from corner to corner
8
Single numeral from 0 to 9
9
Power to which a number is raised
10
Total distance around a shape
Down
2
Three-sided polygon
6
Part of a line with two endpoints
7
Repeated addition
11
Corner point of a polygon