[RESOLVED] Keep my tabs when I use Router

Hello community!
I have a question today about using:
import {Router} from '@ angular/router';

I use it this way:
this.router.navigate ([ 'myPage']);

And I was wondering how to have this url:
tabs/myPage ?

Edit :
I found, I have to use:
this.router.navigateByUrl ( 'tabs/myPage');