How does one link to a child page?

The first attempt to send this bounced (duh, because I wasn’t subscribed
to the list):

This seems like the simplest Radiant question, but I can’t figure out
how to do it.

If I create a home page, and then I create child pages, how do I insert
a link from the home page to one of the child pages? I’m assuming that
there is a Radius tag for this, but perhaps not? Is it just a straight