横向
1
Rectangle with four equal sides
4
Sum divided by count
5
Number less than zero
8
Amount of space an object occupies
11
Symbol representing unknown value
13
Three-sided polygon
纵向
2
Comparison of two quantities
3
Round shape with all points equidistant
6
Steepness of a line
7
Closed shape with straight sides
9
Space between two intersecting lines
10
U-shaped curve of a quadratic function
12
Power to which a number is raised
14
Math using letters for unknown values