Across
1
Number less than zero
6
Line segment connecting two circle points
9
Total distance around a shape
11
Sum divided by count
12
Distance from center to edge of circle
13
Number that divides evenly into another
Down
2
Single numeral from 0 to 9
3
System of ordered marks for measuring
4
Difference between highest and lowest values
5
Longest side of a right triangle
7
Corner point of a polygon
8
Comparison of two quantities
10
Result of addition