Across
1
Corner point of a polygon
5
Number with digits after a point
6
Round shape with all points equidistant
9
Number that divides evenly into another
12
Result of multiplication
Down
2
Steepness of a line
3
Comparison of two quantities
4
Collection of distinct elements
5
Single numeral from 0 to 9
7
Reference line in a graph
8
Parts per hundred
10
The number representing nothing
11
Rectangular array of numbers
13
Rectangle with four equal sides