Across
1
Split into equal parts
3
U-shaped curve of a quadratic function
5
Part of a line with two endpoints
8
Line touching circle at one point
9
Middle value in an ordered dataset
10
Sum divided by count
11
Line crossing from corner to corner
12
Total distance around a shape
Down
2
Number less than zero
4
Single numeral from 0 to 9
6
Closed shape with straight sides
7
Mathematical rule or equation
13
Comparison of two quantities
14
Collection of distinct elements