Across
1
Round shape with all points equidistant
3
Rectangular array of numbers
4
The number representing nothing
5
Exact correspondence on both sides
6
Symbol representing unknown value
11
Rectangle with four equal sides
Down
2
Divisible by two
3
Repeated addition
5
Result of addition
7
Proven mathematical statement
8
Result of multiplication
9
U-shaped curve of a quadratic function
10
Result of raising a number to an exponent