Across
1
Symbol representing unknown value
3
Power to which a number is raised
8
Round shape with all points equidistant
9
Part of a circle's circumference
Down
2
Steepness of a line
4
Math using letters for unknown values
5
Rectangle with four equal sides
6
Number greater than zero
7
Result of raising a number to an exponent
10
Number with digits after a point
11
Value that does not change