Probably a mis-spelling of "diagonals".
3
No but they intersect each other at right angles
six
A square, a rhombus and a kite
no
2
Any rectangle.
Parallelogram (Rectangle, Square, Rhombus, or Rhomboid) or a Kite
a triangle has 0 diagnols
8
2
It is an octagon
Probably a mis-spelling of "diagonals".
A polygon with n sides has n*(n-3)/2 diagonals (not diagnols!).So, an octagon has 8*5/2 = 20 of them.
None
35