Across
1
Sum divided by count
5
Rectangular array of numbers
6
Space between two intersecting lines
7
Split into equal parts
8
Rectangle with four equal sides
11
Corner point of a polygon
Down
1
Math using letters for unknown values
2
Round shape with all points equidistant
3
Part of a circle's circumference
4
Number greater than zero
9
Collection of distinct elements
10
System of ordered marks for measuring