横向
1
Lines that never intersect
4
Number with digits after a point
5
Parts per hundred
7
U-shaped curve of a quadratic function
8
Rectangular array of numbers
纵向
2
Rectangle with four equal sides
3
Round shape with all points equidistant
4
Line crossing from corner to corner
5
Number divisible only by 1 and itself
6
Divisible by two