横向
1
Corner point of a polygon
4
Number with digits after a point
5
Number divisible only by 1 and itself
7
Number that divides evenly into another
8
Steepness of a line
纵向
2
Lines that never intersect
3
Round shape with all points equidistant
6
Amount of space an object occupies
8
Collection of distinct elements
9
Part of a circle's circumference
10
Three-sided polygon