There are times when you might delete a page accidentally may be because you are pissed off / you might not need that page at particular time. But later you want to get back that page for some information purpose.
1. In order to try, just go to http://localhost:4502/siteadmin#/content/geometrixx-media/en/gadgets in your AEM.
Delete the last two highlighted pages
2. Refresh the siteadmin, Now got to Tools -> Restore -> Restore version
3. You will noticed deleted pages, select the page you want to restore and Click on Restore button
Once restored, you should be able to see the deleted pages.