I want to connect my Macbook Air laptop to my LG 4k TV --- what connector should I use?
I want to connect my Macbook Air laptop to my LG 4k TV to do a slide show
--- what connector should I use?
Question marked as
An HDMI connector.
What model / Year of MacBook Air do you have exactly?
Depending on the available ports, would be the connector you'd need. Current MacBook Airs have USB-C ports, so you would want a USB-C to HDMI adapter or dock as suggested in the support document you posted from.
Apple USB-C Digital AV Multiport Adapter
If you have a different mode, please tell us which one, or tell us what ports it has.