Across
1
Proven mathematical statement
3
Closed shape with straight sides
5
Sum divided by count
9
Result of addition
10
Reference line in a graph
12
Rectangular array of numbers
13
Space between two intersecting lines
14
Mathematical rule or equation
Down
2
Divisible by two
3
Lines that never intersect
4
Number with digits after a point
6
Value that does not change
7
Exact correspondence on both sides
8
Total distance around a shape
11
Longest side of a right triangle