Across
1
Exact correspondence on both sides
4
Result of multiplication
6
Corner point of a polygon
7
Lines that never intersect
10
Closed shape with straight sides
12
Total distance around a shape
Down
2
Symbol representing unknown value
3
Sum divided by count
5
Number that divides evenly into another
7
Parts per hundred
8
Longest side of a right triangle
9
Part of a line with two endpoints
11
Reference line in a graph
13
Number less than zero