Across
1
Math using letters for unknown values
4
Power to which a number is raised
6
Corner point of a polygon
8
Number divisible only by 1 and itself
9
Part of a circle's circumference
10
Steepness of a line
Down
2
Number greater than zero
3
System of ordered marks for measuring
5
Reference line in a graph
7
The number representing nothing
8
Result of raising a number to an exponent