Across
1
Parts per hundred
5
Round shape with all points equidistant
6
Proven mathematical statement
7
Single numeral from 0 to 9
8
Math using letters for unknown values
10
Number less than zero
Down
2
Part of a line with two endpoints
3
Total distance around a shape
4
Longest side of a right triangle
9
Number with digits after a point
11
Corner point of a polygon