横向
1
Steepness of a line
4
Part of a line with two endpoints
5
Corner point of a polygon
6
Sum divided by count
7
Result of addition
10
Comparison of two quantities
纵向
2
Amount of space an object occupies
3
Lines that never intersect
4
System of ordered marks for measuring
8
Round shape with all points equidistant
9
Line touching circle at one point