Across
1
Sum divided by count
2
Result of multiplication
6
System of ordered marks for measuring
7
Comparison of two quantities
8
Split into equal parts
9
Proven mathematical statement
Down
2
Closed shape with straight sides
3
Collection of distinct elements
4
Line touching circle at one point
5
Line segment connecting two circle points
6
Result of addition
10
Three-sided polygon
11
Exact correspondence on both sides
12
The number representing nothing