Problems to make a triangular object with angles <90°

Alohaa

Hi,
I need to put this triangular piece on the horizontal to mill it, but I can't get the operation to work.
It is a component of a pyramid roof.
How to do?
Kind regards
Alohaa

Pyramidendach.skp

Alohaa

After contemplating it again, I first thought it was in the horizontal. But no, because of the shadow in the screenshot it should not be.

Rich O Brien

First thing to raise is face normals or, as SketchUp refers to them, Back faces.

The blue colouring is a sign your geometry is inside out. A big No No when designing in 3D.

To correct that select a 'white' face and right click and choose Orient Faces

Now at the bottom double the face to select and its boundary edges and also select the 3 perpendicular edges and delete them. You should have this...

Redraw any edge of the hole to form a face, PushPull it and and inference a bottom edge to punch the hole through

Alohaa

Hi,
I don't find the equivalent of that menu in my Sketchup Pro 22.0.354 in german.
What do you call a white face? and what do you mean by "inside out"?

The menu I get when right clicking on the "white" triangle in the middle:

Rich O Brien

A right click menu is a context menu. So it changes depending on the context.

Edit your components by double clicking and then select a face to see context menu entries related to raw geometry.

Alohaa

I had found that by myself and tried to delete my previous message but didn't succeed in doing it.
..but it still isn't flat.

"...bottom double [click] the face to select and its boundary edges and also select the 3 perpendicular edges and delete them"
I am not sure to understand which face and perpendicular (there are no 90°corners, except in the inner triangle) edges you mean. Do you mean the dotted "cage" surrounding the object?