Across
1
Amount of space an object occupies
3
Single numeral from 0 to 9
4
Comparison of two quantities
5
Closed shape with straight sides
9
Space between two intersecting lines
10
Divisible by two
12
Reference line in a graph
15
Part of a circle's circumference
Down
2
Number less than zero
6
Line crossing from corner to corner
7
Round shape with all points equidistant
8
Parts per hundred
11
The number representing nothing
13
Number that divides evenly into another
14
Repeated addition