横向
1
Number with digits after a point
4
Result of addition
5
Total distance around a shape
6
Split into equal parts
8
Lines that never intersect
9
Longest side of a right triangle
11
Round shape with all points equidistant
14
Line crossing from corner to corner
纵向
2
Amount of space an object occupies
3
Exact correspondence on both sides
4
System of ordered marks for measuring
7
Middle value in an ordered dataset
10
Proven mathematical statement
12
Line segment connecting two circle points
13
The number representing nothing