Asp.Net Web Forms limitation

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ASP.NET

Javascript

web

AngularJs

Hello All , I am using Angular JS with Asp.Net Web Forms, I have to apply validation using Angular Js on my input controls. As web forms can have only one form tag.
What will be the solution to have angular validation ob button click under such circumstances.

<div>
    <form runat="server">
        <div>

// angular validation here
            <form>
<input input="text" ng-model="name" required/>
<input input="button" ng-click="name();"/>
            </form>
        </div>
    </form>
</div>

Warning:"form must not be nested in form"