Across
1
Visual representation of data
3
Collection of distinct elements
4
Line crossing from corner to corner
5
Three-sided polygon
7
Result of addition
11
The number representing nothing
13
Parts per hundred
Down
2
Part of a line with two endpoints
3
Steepness of a line
6
Number divisible only by 1 and itself
8
Result of multiplication
9
Rectangular array of numbers
10
Line touching circle at one point
12
Symbol representing unknown value