Across
1
Proven mathematical statement
4
Math using letters for unknown values
6
The number representing nothing
7
Line touching circle at one point
Down
2
System of ordered marks for measuring
3
Value that does not change
4
Space between two intersecting lines
5
Comparison of two quantities
8
Corner point of a polygon
9
Number with digits after a point
10
Part of a circle's circumference
11
Mathematical statement of equality
12
Power to which a number is raised
13
Middle value in an ordered dataset