Across
1
Proven mathematical statement
2
Split into equal parts
3
Part of a circle's circumference
5
Amount of space an object occupies
6
Number less than zero
7
U-shaped curve of a quadratic function
8
Result of addition
9
Distance from center to edge of circle
Down
1
Line touching circle at one point
2
Line crossing from corner to corner
4
Rectangular array of numbers
8
Steepness of a line
10
The number representing nothing
11
Repeated addition