Across
1
Parts per hundred
4
System of ordered marks for measuring
5
Symbol representing unknown value
9
Number that divides evenly into another
12
Round shape with all points equidistant
Down
1
Number divisible only by 1 and itself
2
Visual representation of data
3
Number with digits after a point
4
Steepness of a line
6
Three-sided polygon
7
Collection of distinct elements
8
Split into equal parts
10
Line touching circle at one point
11
Part of a circle's circumference