横向
1
Part of a line with two endpoints
4
Number with digits after a point
6
U-shaped curve of a quadratic function
9
Result of addition
10
Split into equal parts
11
Line crossing from corner to corner
12
Result of raising a number to an exponent
纵向
2
Math using letters for unknown values
3
Repeated addition
5
Proven mathematical statement
7
Round shape with all points equidistant
8
Rectangular array of numbers
9
Exact correspondence on both sides
13
Part of a circle's circumference