Across
1
Rectangle with four equal sides
2
Total distance around a shape
4
Line touching circle at one point
5
Rectangular array of numbers
7
Comparison of two quantities
Down
2
Result of multiplication
3
Number divisible only by 1 and itself
6
Proven mathematical statement
8
The number representing nothing
9
Part of a circle's circumference
10
Longest side of a right triangle
11
Part of a whole number
12
U-shaped curve of a quadratic function