Project angled edge onto plane (like casting shadow)

[donaldstjohn]

Hello.  I am very new to Fusion, and don't know the jargon well enough, so forgive my ignorance as I learn.  I will try to describe in simple geometric terms.

Imagine a cylinder whose base is the XY plane, the central axis of which is in the Z direction.  Slice off the top of the cylinder at a 20 degree angle.  I want to project that top angled edge onto the XY plane, along the Z axis, at a 15 degree angle as if I were shining a light straight down the Z axis and casting a shadow on the XY plane.  The resultant shadow should be eliptical.

I was able to create the cylinder and sloped top face, but am stuck on how to project a shadow.  It's supposed to represent a draft angle so I can know what the bottom outside shape will look like.  I attached my cylinder drawing, and a crude sketch of what I'm talking about.  Greatly appreciate any help.

[davebYYPCU]

Can get that with the Surface > Sweep Tool.

Sweep the top ellipse profile, down the Axial Line, with taper angle (15).

Extract the projected ellipse with Project > Intersect in a new sketch.

Might help....

[HughesTooling]

You might be able to use the draft tool, there's an option for parting line draft.

Select like this.

Then add draft.