Across
1
Corner point of a polygon
3
Part of a circle's circumference
4
Closed shape with straight sides
5
Sum divided by count
9
Rectangle with four equal sides
Down
2
Power to which a number is raised
3
Reference line in a graph
4
U-shaped curve of a quadratic function
6
Difference between highest and lowest values
7
Lines that never intersect
8
Round shape with all points equidistant