Across
1
Corner point of a polygon
2
Rectangle with four equal sides
3
U-shaped curve of a quadratic function
4
Number with digits after a point
7
Amount of space an object occupies
8
Sum divided by count
10
Reference line in a graph
11
Longest side of a right triangle
Down
2
Exact correspondence on both sides
3
Closed shape with straight sides
5
Number less than zero
6
Difference between highest and lowest values
9
Space between two intersecting lines