Across
1
Number greater than zero
6
Number with digits after a point
7
Value that does not change
8
Space between two intersecting lines
11
Result of raising a number to an exponent
12
Rectangle with four equal sides
Down
2
Line crossing from corner to corner
3
Round shape with all points equidistant
4
Number less than zero
5
The number representing nothing
9
Proven mathematical statement
10
Longest side of a right triangle