Across
1
Repeated addition
2
Part of a circle's circumference
5
Result of multiplication
7
Number less than zero
13
Rectangular array of numbers
Down
2
Reference line in a graph
3
Closed shape with straight sides
4
Exact correspondence on both sides
5
Lines that never intersect
6
Number that divides evenly into another
8
Line segment connecting two circle points
9
System of ordered marks for measuring
10
Comparison of two quantities
11
Three-sided polygon
12
Line touching circle at one point