Across
1
Sum divided by count
6
U-shaped curve of a quadratic function
7
The number representing nothing
8
Distance from center to edge of circle
9
Result of addition
Down
2
Comparison of two quantities
3
Number divisible only by 1 and itself
4
Proven mathematical statement
5
Part of a circle's circumference
10
Line crossing from corner to corner
11
Space between two intersecting lines
12
Part of a whole number