Across
1
Divisible by two
5
Longest side of a right triangle
6
Difference between highest and lowest values
7
Line segment connecting two circle points
8
Mathematical statement of equality
9
Lines that never intersect
Down
2
Part of a whole number
3
Round shape with all points equidistant
4
Symbol representing unknown value
10
Sum divided by count
11
Three-sided polygon
12
Number less than zero