Across
1
Line touching circle at one point
4
Number divisible only by 1 and itself
6
Closed shape with straight sides
7
Part of a line with two endpoints
8
Part of a circle's circumference
10
Line segment connecting two circle points
Down
2
Single numeral from 0 to 9
3
Collection of distinct elements
4
Total distance around a shape
5
Space between two intersecting lines
6
Result of multiplication
9
Split into equal parts
11
Mathematical rule or equation