Across
1
Closed shape with straight sides
3
Lines that never intersect
4
Single numeral from 0 to 9
6
Line touching circle at one point
7
Distance from center to edge of circle
8
Steepness of a line
10
Proven mathematical statement
Down
2
Number that divides evenly into another
4
Number with digits after a point
5
Mathematical rule or equation
9
Math using letters for unknown values