dash or not?

[Eway]

I see people write "eight petal shaped panels", "eight-petal shaped panels", "eight petal-shaped panels", as well as "eight-petal-shaped panels".
Why do some of them use dash and some don't?
Are they all correct?

[Casiopea]

I see people write "eight petal shaped panels", "eight-petal shaped panels", "eight petal-shaped panels", as well as "eight-petal-shaped panels". Why do some of them use dash and some don't?
Are they all correct?

A hyphen is used to join two words that are closely connected.

1. petal-shaped panels (the shape is that of a petal)
2. eight-petal shaped panels (the petal has eight parts)
3. eight-petal-shaped panels (the shape is that of a petal, and the petal has eight parts)

2. and 3. mean the same thing; The second dash in 3. is not necessary:

Examples
1. There are eight panels and they are petal-shaped.
2. There are eight panels and they are eight-petal shaped.
3. There are eight panels and they are petal-shaped, and shape of the petal has eight parts.

[Eway]

I got it.

Thank you!!

[Casiopea]

You're welcome