How to make a triangular platform at specified coordinates

I would like to make a triangular platform at three specified coordinates within the map.
So for example, in first person view your character would click on the three places where the platform would be and then a triangular platform would appear. How would this be done?
Specifically through the programming blueprint system.

Search for CustomMeshComponent. That’s what you want.

Thank you! Any tutorials on how to use this? I’m very much confused on how to apply this to my circumstance.