Across
1
Single numeral from 0 to 9
3
Line segment connecting two circle points
4
Closed shape with straight sides
5
Reference line in a graph
7
Mathematical statement of equality
8
Divisible by two
12
Part of a line with two endpoints
Down
2
Distance from center to edge of circle
4
Parts per hundred
6
System of ordered marks for measuring
9
Comparison of two quantities
10
Line crossing from corner to corner
11
Total distance around a shape