Across
1
Part of a circle's circumference
3
Number divisible only by 1 and itself
5
The number representing nothing
9
Parts per hundred
10
Corner point of a polygon
Down
2
Difference between highest and lowest values
4
Steepness of a line
6
Split into equal parts
7
Part of a line with two endpoints
8
Round shape with all points equidistant
11
Result of multiplication