Across
1
Rectangular array of numbers
2
Steepness of a line
3
Line touching circle at one point
6
Lines that never intersect
8
Difference between highest and lowest values
9
Value that does not change
Down
2
Rectangle with four equal sides
4
Power to which a number is raised
5
Single numeral from 0 to 9
7
Result of raising a number to an exponent
10
Longest side of a right triangle
11
Line crossing from corner to corner