Across
1
Proven mathematical statement
6
Line crossing from corner to corner
8
Line touching circle at one point
9
Space between two intersecting lines
10
Corner point of a polygon
11
Rectangle with four equal sides
12
Lines that never intersect
Down
2
Comparison of two quantities
3
Number that divides evenly into another
4
Repeated addition
5
Longest side of a right triangle
7
Sum divided by count
13
Mathematical rule or equation