Across
1
Rectangle with four equal sides
4
Part of a line with two endpoints
7
Visual representation of data
8
Single numeral from 0 to 9
11
Line touching circle at one point
12
Value that does not change
Down
2
Distance from center to edge of circle
3
Number greater than zero
5
Math using letters for unknown values
6
Divisible by two
9
Space between two intersecting lines
10
Longest side of a right triangle
13
Comparison of two quantities