Across
1
Rectangular array of numbers
4
Three-sided polygon
5
Part of a line with two endpoints
10
Repeated addition
11
Split into equal parts
12
Result of multiplication
Down
2
Mathematical statement of equality
3
Round shape with all points equidistant
6
Number less than zero
7
Total distance around a shape
8
Closed shape with straight sides
9
Corner point of a polygon
13
Single numeral from 0 to 9