Across
1
Number divisible only by 1 and itself
4
Reference line in a graph
5
U-shaped curve of a quadratic function
7
Number less than zero
10
Line segment connecting two circle points
Down
2
The number representing nothing
3
Longest side of a right triangle
6
Rectangular array of numbers
8
Mathematical rule or equation
9
Split into equal parts
11
Distance from center to edge of circle
12
Corner point of a polygon