What adapter do I need to connect my iPad Pro 2017 A1701 to a video projector?

For your iPad, the correct adapter to connect to an HDMI projector or monitor should be a Lightning-to-HDMI (Digital AV) adapter. As such, I suggest you consider the Apple Lightning Digital AV Adapter.

Sorry, I was thinking of iPad models that have Lightning ports. Which your iPad Pro, as you know, does not. It has a USB-C port instead.

As such, see if any of these could work for you:

• Apple USB‑C Digital AV Multiport Adapter
• Anker 310 USB‑C to HDMI Adapter
• CalDigit USB‑C to HDMI 2.1 Adapter