Across
1
Line touching circle at one point
2
Parts per hundred
3
Result of raising a number to an exponent
4
Result of addition
5
Sum divided by count
6
Mathematical rule or equation
7
Line crossing from corner to corner
Down
2
Total distance around a shape
3
Number divisible only by 1 and itself
5
Part of a circle's circumference
8
The number representing nothing
9
Steepness of a line