Across
1
Round shape with all points equidistant
4
Symbol representing unknown value
5
Lines that never intersect
6
Part of a line with two endpoints
7
Split into equal parts
11
Power to which a number is raised
12
Math using letters for unknown values
Down
2
Difference between highest and lowest values
3
Number less than zero
8
Comparison of two quantities
9
Proven mathematical statement
10
Repeated addition
13
U-shaped curve of a quadratic function