Across
1
Line touching circle at one point
3
Mathematical rule or equation
9
Result of addition
10
Result of multiplication
11
Steepness of a line
Down
2
Closed shape with straight sides
4
Middle value in an ordered dataset
5
Amount of space an object occupies
6
Reference line in a graph
7
Repeated addition
8
Collection of distinct elements
12
Part of a circle's circumference