横向
1
Part of a circle's circumference
3
Longest side of a right triangle
4
U-shaped curve of a quadratic function
8
Distance from center to edge of circle
9
Symbol representing unknown value
13
Closed shape with straight sides
14
Corner point of a polygon
纵向
2
Lines that never intersect
5
Amount of space an object occupies
6
Rectangular array of numbers
7
Repeated addition
10
Mathematical statement of equality
11
System of ordered marks for measuring
12
Number less than zero