Across
1
Mathematical rule or equation
4
Sum divided by count
5
Space between two intersecting lines
9
Value that does not change
10
Line touching circle at one point
Down
2
Amount of space an object occupies
3
Difference between highest and lowest values
6
Symbol representing unknown value
7
Part of a circle's circumference
8
Steepness of a line
11
Longest side of a right triangle