Across
1
Line touching circle at one point
4
Reference line in a graph
6
Corner point of a polygon
7
Split into equal parts
8
Sum divided by count
9
Line segment connecting two circle points
11
Rectangular array of numbers
12
Comparison of two quantities
Down
2
Number with digits after a point
3
Part of a whole number
5
Mathematical statement of equality
10
Proven mathematical statement