横向
1
Distance from center to edge of circle
3
Lines that never intersect
4
System of ordered marks for measuring
5
U-shaped curve of a quadratic function
9
Part of a whole number
11
Rectangular array of numbers
纵向
2
Symbol representing unknown value
5
Result of multiplication
6
Number less than zero
7
Closed shape with straight sides
8
Reference line in a graph
10
Three-sided polygon