Across
1
Lines that never intersect
4
Rectangular array of numbers
5
Part of a circle's circumference
8
Comparison of two quantities
Down
1
Result of raising a number to an exponent
2
Round shape with all points equidistant
3
Line crossing from corner to corner
6
Symbol representing unknown value
7
Exact correspondence on both sides
9
Single numeral from 0 to 9