A nine sided nonagon has 27 diagonals
parallel
No because a nonagon which is a 9 sided shape has 27 diagonals
9 diagonals
None
Two.Two.Two.Two.
In a regular nonagon no two sides are parallel.
A 9 sided nonagon normally has no perpendicular lines that meet at right angles
it depends on what you mean by a diagonal. If you take a diagonal to mean a line from one corner to the "opposite" corner, then a nonagon doesn't have any, and a decagon has five. The reason a nonagon doesn't have any, is that the corners aren't opposite each other.
parallel
A heptagon has 4 diagonal lines and 7 sides and it has 2 congruent diagonal lines and 2 congruent triangles
A nonagon is a nine-sided polygon. In a nonagon, there are four pairs of parallel lines. This is because the nonagon can be divided into three sets of parallel lines, each containing three parallel lines. Each set of parallel lines consists of three pairs of parallel lines.
There are four diagonal lines in a hexagon.
No because a nonagon which is a 9 sided shape has 27 diagonals
In general, none, but there can be nine.
zero
it has 4 :)
4