Across
1
Comparison of two quantities
3
Part of a circle's circumference
4
Result of raising a number to an exponent
5
Line segment connecting two circle points
7
Steepness of a line
8
Single numeral from 0 to 9
9
Line touching circle at one point
Down
2
Rectangular array of numbers
4
Closed shape with straight sides
5
Round shape with all points equidistant
6
Total distance around a shape