Across
1
Line crossing from corner to corner
4
Three-sided polygon
5
U-shaped curve of a quadratic function
7
Line segment connecting two circle points
9
Number with digits after a point
Down
1
Split into equal parts
2
Distance from center to edge of circle
3
Rectangular array of numbers
5
Closed shape with straight sides
6
Middle value in an ordered dataset
8
Total distance around a shape