Across
1
Value that does not change
4
Rectangle with four equal sides
5
Result of raising a number to an exponent
6
Number divisible only by 1 and itself
7
Number with digits after a point
8
Three-sided polygon
9
Power to which a number is raised
Down
2
Sum divided by count
3
Line touching circle at one point
5
Result of multiplication
6
Total distance around a shape