Across
1
Split into equal parts
2
Value that does not change
3
Steepness of a line
8
Math using letters for unknown values
9
Part of a circle's circumference
Down
1
Single numeral from 0 to 9
3
System of ordered marks for measuring
4
Comparison of two quantities
5
Line touching circle at one point
6
Part of a whole number
7
Sum divided by count