Across
1
Mathematical rule or equation
3
Steepness of a line
5
Number divisible only by 1 and itself
6
Total distance around a shape
8
Number less than zero
11
Single numeral from 0 to 9
Down
2
Repeated addition
3
Rectangle with four equal sides
4
Number greater than zero
7
Part of a circle's circumference
9
Closed shape with straight sides
10
Value that does not change