Across
1
Rectangle with four equal sides
2
Symbol representing unknown value
3
Part of a line with two endpoints
4
Collection of distinct elements
5
Part of a whole number
9
Repeated addition
Down
1
Exact correspondence on both sides
2
Corner point of a polygon
6
Reference line in a graph
7
Divisible by two
8
Sum divided by count
10
Amount of space an object occupies