Across
1
Line segment connecting two circle points
3
Sum divided by count
4
Line touching circle at one point
6
Closed shape with straight sides
7
Split into equal parts
12
Proven mathematical statement
Down
2
Mathematical statement of equality
3
Part of a circle's circumference
5
Number with digits after a point
8
Number less than zero
9
Comparison of two quantities
10
Value that does not change
11
System of ordered marks for measuring