横向
1
Line segment connecting two circle points
2
Result of raising a number to an exponent
4
The number representing nothing
5
Line crossing from corner to corner
6
Collection of distinct elements
8
Divisible by two
9
Reference line in a graph
纵向
1
Value that does not change
2
U-shaped curve of a quadratic function
3
Distance from center to edge of circle
7
Corner point of a polygon