Across
1
Single numeral from 0 to 9
2
Total distance around a shape
4
Steepness of a line
5
Line touching circle at one point
6
Middle value in an ordered dataset
7
Math using letters for unknown values
9
Result of multiplication
11
Symbol representing unknown value
Down
2
Closed shape with straight sides
3
Parts per hundred
6
Rectangular array of numbers
8
System of ordered marks for measuring
10
Reference line in a graph