Across
1
Rectangle with four equal sides
4
Space between two intersecting lines
5
The number representing nothing
6
Mathematical statement of equality
7
Math using letters for unknown values
10
Number divisible only by 1 and itself
13
Part of a line with two endpoints
Down
2
U-shaped curve of a quadratic function
3
Number less than zero
8
Round shape with all points equidistant
9
Proven mathematical statement
11
Divisible by two
12
Reference line in a graph
14
Line crossing from corner to corner