横向
1
Space between two intersecting lines
4
System of ordered marks for measuring
5
Repeated addition
7
Math using letters for unknown values
8
Split into equal parts
10
Sum divided by count
11
Result of multiplication
纵向
2
U-shaped curve of a quadratic function
3
Amount of space an object occupies
6
Line touching circle at one point
9
Mathematical rule or equation
12
Corner point of a polygon