How to Embed a Google Slides Presentation
General
To embed a google doc - go to File->publish and then select 'html to embed in a page'. Then cut and paste this URL into the wiki in between <html>
and </html>
tags.
To embed an editable link, just copy and paste (into a wiki page) the URL from the top of the Google Doc page.
Iframe
<iframe src="/default.asp" width=100% height="200"> </iframe>
How to Embed a Specific Page of a Google Presentation
Use #page as, for example, in #3 in html><iframe src="https://docs.google.com/presentation/d/e/2PACX-1vShiXR-dpEfn5BVMK88BM0RAIKGIFlW2c-t5uYmV8ne27Y8LYvhWnb1zbb3AvbYdWl28W_ixUc9Hys2/embed?start=false&loop=false&delayms=3000#3" frameborder="0" width="960" height="569" allowfullscreen="true" mozallowfullscreen="true" webkitallowfullscreen="true"></iframe></html>
That goes to the 3rd page in the presentation. #3 is the last thing in the URL of the google doc.