Across
1
Lines that never intersect
4
Collection of distinct elements
6
Single numeral from 0 to 9
7
Number that divides evenly into another
8
Mathematical statement of equality
9
Closed shape with straight sides
13
Round shape with all points equidistant
Down
2
Amount of space an object occupies
3
Power to which a number is raised
4
Exact correspondence on both sides
5
Difference between highest and lowest values
10
Parts per hundred
11
U-shaped curve of a quadratic function
12
Three-sided polygon