Across
1
Result of multiplication
3
Result of addition
6
Number with digits after a point
8
Line segment connecting two circle points
10
Corner point of a polygon
11
Closed shape with straight sides
12
Distance from center to edge of circle
Down
2
The number representing nothing
3
Collection of distinct elements
4
Round shape with all points equidistant
5
Middle value in an ordered dataset
7
Steepness of a line
9
Proven mathematical statement