Across
1
Total distance around a shape
6
Single numeral from 0 to 9
7
Rectangular array of numbers
8
Mathematical rule or equation
9
Split into equal parts
10
Parts per hundred
Down
2
Symbol representing unknown value
3
Corner point of a polygon
4
Number with digits after a point
5
Line segment connecting two circle points
11
Result of raising a number to an exponent
12
Collection of distinct elements