It's fairly straightforward. You can easily give show/hide functionality to pretty much any el using ng-show="myModelName". In the official documentation they achieve this using a checkbox.
Question: Can you use ng-show on a select option? I want to show/hide different els depending on the option selected.
e.g.
<select ng-model="myDropDown">
<option value="one">One</option>
<option value="two">Two</option>
<option value="three">Three</option>
</select>
<input ng-show="myDropDown='two'" type="text">
You were close you will want to use == here like this:
<input ng-show="myDropDown=='two'" type="text">
See this fiddle for an example.