Across
1
System of ordered marks for measuring
3
Parts per hundred
4
Line segment connecting two circle points
5
Three-sided polygon
13
Line touching circle at one point
Down
2
Number with digits after a point
3
Number divisible only by 1 and itself
6
Closed shape with straight sides
7
Number that divides evenly into another
8
Longest side of a right triangle
9
Middle value in an ordered dataset
10
Corner point of a polygon
11
Repeated addition
12
The number representing nothing