Across
1
U-shaped curve of a quadratic function
3
Total distance around a shape
5
Split into equal parts
8
Round shape with all points equidistant
10
Mathematical statement of equality
11
Line crossing from corner to corner
Down
2
Number with digits after a point
4
Line segment connecting two circle points
6
Steepness of a line
7
Exact correspondence on both sides
9
Math using letters for unknown values
12
Part of a whole number
13
The number representing nothing