Across
1
Proven mathematical statement
3
Number with digits after a point
4
Mathematical rule or equation
7
U-shaped curve of a quadratic function
8
Rectangular array of numbers
9
Number less than zero
10
Symbol representing unknown value
Down
1
Three-sided polygon
2
Rectangle with four equal sides
3
Split into equal parts
5
Total distance around a shape
6
Repeated addition
11
Mathematical statement of equality
12
Comparison of two quantities