横向
1
Exact correspondence on both sides
5
Reference line in a graph
6
Three-sided polygon
7
Math using letters for unknown values
9
Result of multiplication
10
Part of a line with two endpoints
纵向
2
Number that divides evenly into another
3
Value that does not change
4
Total distance around a shape
8
Amount of space an object occupies
11
Steepness of a line
12
Space between two intersecting lines
13
Distance from center to edge of circle