Across
1
Symbol representing unknown value
4
Proven mathematical statement
6
Corner point of a polygon
7
Collection of distinct elements
9
Number divisible only by 1 and itself
10
U-shaped curve of a quadratic function
Down
2
Reference line in a graph
3
The number representing nothing
5
Single numeral from 0 to 9
6
Amount of space an object occupies
8
Mathematical statement of equality