Across
1
Split into equal parts
4
U-shaped curve of a quadratic function
6
Line touching circle at one point
7
Result of addition
10
Part of a line with two endpoints
11
Amount of space an object occupies
12
Closed shape with straight sides
Down
2
Number less than zero
3
Mathematical statement of equality
5
Reference line in a graph
8
Repeated addition
9
Power to which a number is raised
13
Lines that never intersect