What's a diagonal line?

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Tags

1. #vertices
2. #extending
3. #matrix
4. #those
5. #corner
6. #geometry
7. #square
8. #farthest
9. #diagonal
10. #polyhedron
11. #algebra
12. #sloping
13. #segment
14. #called
15. #entries
16. #joining
17. #informally
18. #polygon