Across
1
Line crossing from corner to corner
6
Total distance around a shape
7
Rectangular array of numbers
8
Number less than zero
10
Steepness of a line
Down
2
Space between two intersecting lines
3
Distance from center to edge of circle
4
System of ordered marks for measuring
5
Mathematical statement of equality
9
Number that divides evenly into another
11
Number greater than zero