Across
1
System of ordered marks for measuring
3
Single numeral from 0 to 9
5
Parts per hundred
6
Result of multiplication
8
Part of a line with two endpoints
9
Corner point of a polygon
Down
2
Line touching circle at one point
4
Round shape with all points equidistant
5
Number divisible only by 1 and itself
7
Number greater than zero
10
The number representing nothing
11
Value that does not change