横向
1
U-shaped curve of a quadratic function
4
Split into equal parts
7
Part of a whole number
9
Exact correspondence on both sides
12
Rectangle with four equal sides
13
Line crossing from corner to corner
14
Sum divided by count
纵向
2
Amount of space an object occupies
3
Three-sided polygon
5
Math using letters for unknown values
6
Distance from center to edge of circle
8
Proven mathematical statement
10
Repeated addition
11
Comparison of two quantities