Across
1
Math using letters for unknown values
4
Reference line in a graph
6
Total distance around a shape
8
Longest side of a right triangle
9
Number that divides evenly into another
Down
2
Middle value in an ordered dataset
3
Rectangular array of numbers
5
Mathematical statement of equality
7
System of ordered marks for measuring
10
Result of addition
11
Symbol representing unknown value
12
Corner point of a polygon