Across
1
Exact correspondence on both sides
5
Line segment connecting two circle points
6
Round shape with all points equidistant
8
System of ordered marks for measuring
10
Number with digits after a point
11
Rectangle with four equal sides
Down
1
Collection of distinct elements
2
Repeated addition
3
Total distance around a shape
4
Number divisible only by 1 and itself
7
Comparison of two quantities
9
Number that divides evenly into another
12
Amount of space an object occupies