Across
1
Rectangle with four equal sides
2
Number divisible only by 1 and itself
3
Symbol representing unknown value
4
Value that does not change
5
Corner point of a polygon
8
Mathematical statement of equality
10
The number representing nothing
Down
1
Part of a line with two endpoints
2
Parts per hundred
6
Math using letters for unknown values
7
Distance from center to edge of circle
9
Line touching circle at one point
11
Proven mathematical statement
12
Number less than zero