Across
1
Line touching circle at one point
5
Number divisible only by 1 and itself
6
Divisible by two
7
Number that divides evenly into another
11
Longest side of a right triangle
12
Three-sided polygon
Down
2
Closed shape with straight sides
3
Parts per hundred
4
Single numeral from 0 to 9
5
Number greater than zero
8
Result of addition
9
Part of a circle's circumference
10
Sum divided by count