Across
1
Result of raising a number to an exponent
3
Number less than zero
5
Total distance around a shape
6
Exact correspondence on both sides
9
Closed shape with straight sides
10
Collection of distinct elements
12
Value that does not change
Down
1
Result of multiplication
2
Difference between highest and lowest values
4
Distance from center to edge of circle
7
Sum divided by count
8
Split into equal parts
11
Divisible by two
13
Rectangle with four equal sides