Across
1
Result of raising a number to an exponent
3
Split into equal parts
5
Difference between highest and lowest values
6
Space between two intersecting lines
8
Part of a line with two endpoints
9
Divisible by two
11
Part of a circle's circumference
Down
2
Sum divided by count
4
Total distance around a shape
7
Round shape with all points equidistant
10
Longest side of a right triangle
12
Number greater than zero
13
Lines that never intersect