横向
1
Round shape with all points equidistant
5
Longest side of a right triangle
7
Line crossing from corner to corner
8
Symbol representing unknown value
11
Number less than zero
纵向
2
Number that divides evenly into another
3
Mathematical statement of equality
4
U-shaped curve of a quadratic function
6
Lines that never intersect
9
Result of addition
10
Split into equal parts