Across
1
Number that divides evenly into another
3
Amount of space an object occupies
4
Distance from center to edge of circle
5
Exact correspondence on both sides
6
Split into equal parts
10
Collection of distinct elements
11
Repeated addition
12
U-shaped curve of a quadratic function
Down
2
Parts per hundred
3
Symbol representing unknown value
7
Result of addition
8
Three-sided polygon
9
Comparison of two quantities