Across
1
Rectangle with four equal sides
4
Closed shape with straight sides
5
Single numeral from 0 to 9
6
Part of a whole number
9
Amount of space an object occupies
10
Math using letters for unknown values
Down
2
Distance from center to edge of circle
3
Round shape with all points equidistant
4
Total distance around a shape
7
Three-sided polygon
8
Comparison of two quantities
11
Number less than zero