Across
1
Collection of distinct elements
2
Line segment connecting two circle points
3
Space between two intersecting lines
4
Line touching circle at one point
5
Number less than zero
8
The number representing nothing
11
Difference between highest and lowest values
12
Mathematical rule or equation
13
Repeated addition
Down
2
Value that does not change
6
Result of raising a number to an exponent
7
Result of multiplication
9
Math using letters for unknown values
10
Middle value in an ordered dataset