Across
1
The number representing nothing
4
Result of addition
5
Middle value in an ordered dataset
7
Line touching circle at one point
8
Result of raising a number to an exponent
9
Total distance around a shape
Down
2
Proven mathematical statement
3
U-shaped curve of a quadratic function
4
Part of a line with two endpoints
6
Round shape with all points equidistant
10
Value that does not change