Across
1
Line touching circle at one point
2
Part of a circle's circumference
6
Repeated addition
7
Line crossing from corner to corner
8
Number that divides evenly into another
9
Closed shape with straight sides
10
Amount of space an object occupies
11
Single numeral from 0 to 9
12
Exact correspondence on both sides
Down
1
Three-sided polygon
3
Number with digits after a point
4
Number greater than zero
5
Math using letters for unknown values