Across
1
Power to which a number is raised
6
Part of a whole number
7
Three-sided polygon
8
Number with digits after a point
10
Result of addition
11
Number greater than zero
12
Exact correspondence on both sides
Down
2
Symbol representing unknown value
3
Proven mathematical statement
4
Repeated addition
5
System of ordered marks for measuring
9
Split into equal parts
10
Collection of distinct elements