Across
1
Result of addition
3
Rectangle with four equal sides
4
Longest side of a right triangle
8
Value that does not change
11
Steepness of a line
Down
2
Amount of space an object occupies
5
Mathematical rule or equation
6
Reference line in a graph
7
Middle value in an ordered dataset
9
Part of a circle's circumference
10
Part of a whole number
11
Exact correspondence on both sides