I have looked at the official show/hide transition example at the bottom of this page... http://docs.angularjs.org/api/ng.directive:ngShow
I have tried to modify it
You can use ng-animate in conjuction with ng-show (http://docs.angularjs.org/api/ngAnimate), available from Angular 1.1.4. Or alternatively simply apply a show class when the model is ticked and apply your show and animation to the class.
show
Show div