横向
1
Math using letters for unknown values
5
Line touching circle at one point
6
Lines that never intersect
7
Value that does not change
11
Reference line in a graph
13
Amount of space an object occupies
纵向
2
Mathematical statement of equality
3
Closed shape with straight sides
4
Rectangular array of numbers
7
Line segment connecting two circle points
8
Line crossing from corner to corner
9
Longest side of a right triangle
10
Collection of distinct elements
12
Round shape with all points equidistant