UV Mapping problem - triangles?!

Okay so I have no idea how to properly uv unwrap a triangle, and I also don’t know if this is the right place to ask this :stuck_out_tongue: Notice the stretching towards the top corner. How can I fix this? Thanks!

In various cases such as this, you can just go ‘U > project from view’ and it should just map the texture to the surface without stretching.