Across
1
Amount of space an object occupies
4
Split into equal parts
5
Line touching circle at one point
6
Collection of distinct elements
7
Number divisible only by 1 and itself
12
Distance from center to edge of circle
Down
2
Proven mathematical statement
3
Three-sided polygon
8
Closed shape with straight sides
9
Part of a whole number
10
Rectangular array of numbers
11
Reference line in a graph
13
Divisible by two