横向
1
Mathematical statement of equality
6
Number divisible only by 1 and itself
7
U-shaped curve of a quadratic function
9
Math using letters for unknown values
11
Middle value in an ordered dataset
12
Rectangle with four equal sides
纵向
2
Line touching circle at one point
3
Collection of distinct elements
4
Sum divided by count
5
Line segment connecting two circle points
8
Amount of space an object occupies
10
Part of a whole number