How do I do I get the oblique extrusions like picrel in Creo? This is an extra credit problem for Uni and is my first time doing CAD and I know so much that I need to create two new Datum planes and create two symmetrical sketches along the planes that share a common axis at the point of intersection between those planes.

Professor said that the units do not matter.

I asked my professor and will be meeting with him a little bit later, I just was wondering if anyone on here could tell me what I can do to get the desired results. Thanks.

P.S: This is my work so far: https://files.catbox.moe/trr3l6.1