Across
1
Part of a line with two endpoints
3
Part of a circle's circumference
4
Collection of distinct elements
5
Amount of space an object occupies
6
Symbol representing unknown value
7
Result of raising a number to an exponent
8
Difference between highest and lowest values
Down
1
Result of addition
2
Mathematical statement of equality
4
Steepness of a line
9
Number with digits after a point
10
Value that does not change
11
Number greater than zero