Across
1
Repeated addition
5
Line touching circle at one point
6
Symbol representing unknown value
12
Three-sided polygon
Down
2
Single numeral from 0 to 9
3
U-shaped curve of a quadratic function
4
Result of addition
7
Collection of distinct elements
8
Line crossing from corner to corner
9
Result of multiplication
10
Difference between highest and lowest values
11
Visual representation of data