横向
1
Steepness of a line
4
Amount of space an object occupies
5
Space between two intersecting lines
6
Collection of distinct elements
7
Mathematical statement of equality
纵向
2
Reference line in a graph
3
Longest side of a right triangle
4
Corner point of a polygon
5
Part of a circle's circumference
8
Line touching circle at one point
9
Part of a line with two endpoints
10
Distance from center to edge of circle