Across
1
Three-sided polygon
5
Reference line in a graph
6
System of ordered marks for measuring
7
Number less than zero
8
Divisible by two
9
Distance from center to edge of circle
10
Result of addition
Down
2
Mathematical statement of equality
3
Round shape with all points equidistant
4
Corner point of a polygon
5
Sum divided by count
6
Exact correspondence on both sides