I couldn't find anything about this. basically i want to create a base template, with all the head tag and container in body or menu, etc... so that other templates can extend it.
how would i achieve this with Ionic framework?
The way you have phrased your question leads one to think you have not quite understood how Ionic works...
A typical Ionic app has only one index.html file with a <head>. The rest of the .html files are just content templates to be rendered as the content of that page. So you don't need the "base template" you are asking about, that is all taken care of by Ionic, from the index.html.
I would suggest reading and following http://ionicframework.com/docs/guide/starting.html