Non-angularJS page to angularJS page, and vice versa. Progressive conversion from non-angular to angularJS

I'm currently weighing up whether I should make the jump to angularJS for our medium-sized web application. As the application grows and grows, it is becoming somewhat more difficult to maintain as a result of spaghetti jQuery and just general age. I've read and played a little with AngularJS, and from what I used it is pretty awesome.

The problem is that our web application is in constant use, and I cannot take it offline for any real period of time. Is it possible to progressively change pages from non-angular to angularJS? i.e. say, a page a week? (we have about 6 or 7 data rich pages).

Each page is usually isolated, and they don't usually rely on data from other pages apart from cookies and the occasional querystring.

Is this a sensible approach? Can AngularJS and non-AngularJS pages play nice together? Or would it be better to stick with JavaScript and jQuery?