Across
1
Exact correspondence on both sides
5
Number with digits after a point
8
Mathematical rule or equation
9
Longest side of a right triangle
11
Difference between highest and lowest values
12
Result of multiplication
13
Symbol representing unknown value
Down
2
Power to which a number is raised
3
Total distance around a shape
4
Distance from center to edge of circle
6
Reference line in a graph
7
Part of a whole number
10
Rectangular array of numbers