How to create a component with sub elements in Angular

I try to create an own component in Angular 19 that works similar to the MatCard. There, I can define a template like:

<mat-card appearance="outlined">
<mat-card-header>
<h3>It's a kind of header</h3>
</mat-card-header>

<mat-card-content>
Yippie, here comes my content.
</mat-card-content>

<mat-card-actions>
act as you want
</mat-card-actions>
</mat-card>


What is this kind of template called so I can look for some examples?

Best regards

Parascus

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