Avtar in Hinduism?

re: Avtar in Hinduism?

You asked the same question I was going to ask. I wanted to know that if the trinity is masculine, then ate the goddesses completely different from them or are they avatars of the males that make up the trinity. So, shiva is the destroyer, then is kaali his avatar or connected to him?

And how is one judged? By just one diety of the trinity or all three?