Across
1
Part of a circle's circumference
4
Number less than zero
5
Collection of distinct elements
6
Comparison of two quantities
7
Mathematical statement of equality
8
Result of addition
12
Number divisible only by 1 and itself
Down
2
Rectangular array of numbers
3
Value that does not change
9
Single numeral from 0 to 9
10
Proven mathematical statement
11
Result of raising a number to an exponent