Across
1
System of ordered marks for measuring
3
Visual representation of data
6
Value that does not change
8
Proven mathematical statement
9
Line segment connecting two circle points
Down
2
Result of multiplication
4
Part of a circle's circumference
5
Collection of distinct elements
7
Number with digits after a point
10
Three-sided polygon
11
Single numeral from 0 to 9
12
Mathematical statement of equality