Across
1
Round shape with all points equidistant
5
Reference line in a graph
7
Divisible by two
9
Part of a line with two endpoints
10
Corner point of a polygon
11
Steepness of a line
Down
2
Single numeral from 0 to 9
3
Parts per hundred
4
Mathematical statement of equality
6
System of ordered marks for measuring
8
Amount of space an object occupies
12
Number divisible only by 1 and itself