Across
1
Result of addition
2
Result of raising a number to an exponent
3
Symbol representing unknown value
5
Sum divided by count
6
Rectangular array of numbers
7
Number divisible only by 1 and itself
9
Round shape with all points equidistant
Down
1
System of ordered marks for measuring
2
Parts per hundred
4
Line touching circle at one point
5
Space between two intersecting lines
8
Reference line in a graph