Across
1
Symbol representing unknown value
5
Result of raising a number to an exponent
6
System of ordered marks for measuring
9
Value that does not change
11
Mathematical statement of equality
12
Line touching circle at one point
Down
2
Space between two intersecting lines
3
Number divisible only by 1 and itself
4
Power to which a number is raised
6
Rectangle with four equal sides
7
Number with digits after a point
8
Three-sided polygon
10
Number that divides evenly into another