How to rediect one component to another component in angular

Question

I had 3 component there are 1)index component (iam using router outlet tag ) 2)login component 3)dash component I enterted username and password ,click on login button I want rediect login component to dashboard component ^Index component (parent) Login component (children) ^dashboard component (parent) Here index component one design and dashboard component is the another design so please help ...