Across
1
Part of a whole number
2
Closed shape with straight sides
6
Number less than zero
8
Round shape with all points equidistant
9
Three-sided polygon
10
Line touching circle at one point
11
Line segment connecting two circle points
13
Comparison of two quantities
Down
2
Result of raising a number to an exponent
3
Proven mathematical statement
4
Number greater than zero
5
Parts per hundred
7
Lines that never intersect
12
Sum divided by count