Across
1
U-shaped curve of a quadratic function
6
Part of a line with two endpoints
7
Math using letters for unknown values
8
Proven mathematical statement
9
Lines that never intersect
10
Number less than zero
Down
2
Line crossing from corner to corner
3
Number with digits after a point
4
Longest side of a right triangle
5
Middle value in an ordered dataset
11
Reference line in a graph
12
Steepness of a line
13
Rectangle with four equal sides