Across
1
Rectangle with four equal sides
5
Sum divided by count
7
Parts per hundred
8
Corner point of a polygon
12
Longest side of a right triangle
Down
2
Divisible by two
3
Reference line in a graph
4
Distance from center to edge of circle
5
Space between two intersecting lines
6
Symbol representing unknown value
7
Result of raising a number to an exponent
9
Power to which a number is raised
10
Repeated addition
11
Exact correspondence on both sides