Across
1
Number divisible only by 1 and itself
3
Parts per hundred
4
Part of a circle's circumference
5
Math using letters for unknown values
6
U-shaped curve of a quadratic function
7
Comparison of two quantities
12
Distance from center to edge of circle
Down
1
Number greater than zero
2
Line touching circle at one point
6
Total distance around a shape
8
Corner point of a polygon
9
Difference between highest and lowest values
10
Value that does not change
11
The number representing nothing
13
Line segment connecting two circle points