Across
1
Round shape with all points equidistant
4
Total distance around a shape
7
Collection of distinct elements
10
Number with digits after a point
12
Lines that never intersect
Down
2
Distance from center to edge of circle
3
Proven mathematical statement
4
Result of raising a number to an exponent
5
Line segment connecting two circle points
6
Parts per hundred
8
Result of addition
9
Space between two intersecting lines
11
System of ordered marks for measuring