Across
1
Power to which a number is raised
6
Exact correspondence on both sides
7
Number divisible only by 1 and itself
8
Rectangular array of numbers
9
Total distance around a shape
11
Middle value in an ordered dataset
Down
2
Longest side of a right triangle
3
Parts per hundred
4
Corner point of a polygon
5
Three-sided polygon
7
Lines that never intersect
10
Result of raising a number to an exponent
12
Rectangle with four equal sides