Across
1
Part of a circle's circumference
3
Symbol representing unknown value
4
Exact correspondence on both sides
5
Part of a whole number
8
Divisible by two
Down
2
Mathematical statement of equality
4
System of ordered marks for measuring
6
Comparison of two quantities
7
Parts per hundred
9
Longest side of a right triangle
10
Power to which a number is raised
11
Rectangle with four equal sides
12
Proven mathematical statement