Concentric Circles





This is my new project. I would like to collect vocabulary words and turn to images here. The important main idea is typeface "courier", it's come from typewriter's letters and the type be used on our leather stamping works. 



Day1.
Concentric Circles


I founding these words from a dictionary. Actually, I was be attracted by the nice pictures first and then founding these words.
concentric circles does mean circles having a common centre.
Tell me, Which circles picture is your favourite one?

Is concentric circles? or circles not concentric?