Across
1
Repeated addition
3
Line touching circle at one point
8
Comparison of two quantities
9
The number representing nothing
10
System of ordered marks for measuring
11
Parts per hundred
13
Longest side of a right triangle
14
Symbol representing unknown value
Down
2
Steepness of a line
4
Power to which a number is raised
5
Round shape with all points equidistant
6
Rectangular array of numbers
7
Visual representation of data
12
Middle value in an ordered dataset
15
Total distance around a shape