17. Cloistered away

I love dressing up, but no matter how fancy I look, no one ever takes me out!

I spend most of my time just hanging around — and have been accomplice to an occasional crime — but I’m really a valued member of your household.

I like to stick my neck out, and put my shoulders into everything.

A triangle is my favorite shape, but I like boomerangs too.

What am I?

(Answer below)

Poor clothes hanger, all dressed up with no place to go.