Across
1
Total distance around a shape
7
Result of addition
8
Proven mathematical statement
9
Round shape with all points equidistant
11
Single numeral from 0 to 9
Down
1
Result of multiplication
2
Distance from center to edge of circle
3
Part of a circle's circumference
4
Exact correspondence on both sides
5
Amount of space an object occupies
6
Repeated addition
8
Line touching circle at one point
10
Number with digits after a point
12
Longest side of a right triangle
13
Line segment connecting two circle points