Across
1
Split into equal parts
4
Closed shape with straight sides
7
Sum divided by count
8
Total distance around a shape
9
The number representing nothing
10
Number with digits after a point
11
Rectangle with four equal sides
12
Result of multiplication
Down
2
Reference line in a graph
3
Round shape with all points equidistant
4
Number greater than zero
5
Longest side of a right triangle
6
Space between two intersecting lines