Across
1
Exact correspondence on both sides
5
Lines that never intersect
6
Line segment connecting two circle points
7
Longest side of a right triangle
8
Repeated addition
11
Mathematical statement of equality
Down
2
Number divisible only by 1 and itself
3
Parts per hundred
4
Sum divided by count
9
Value that does not change
10
Closed shape with straight sides
12
Power to which a number is raised
13
Number less than zero
14
Three-sided polygon