横向
1
Longest side of a right triangle
4
Round shape with all points equidistant
5
Number that divides evenly into another
8
Space between two intersecting lines
10
Line crossing from corner to corner
11
Line touching circle at one point
13
Proven mathematical statement
纵向
2
Reference line in a graph
3
Corner point of a polygon
6
Number less than zero
7
Result of multiplication
9
Steepness of a line
12
Closed shape with straight sides