HELP creating geometric shape for 3D printer

[curious aardvark]

is that two pyramids - base to base, attached to another base to base pyramid ?

basically two of these, stuck together along one of the faces ?

double pyramid.jpg

Also dimensions are determined by the slicer before you print. You can make them anything you like :-)
Size of a model like this within a cad program is largely irrelevant.

More pictures wouild be useful - not entirely sure of the shape.
Is this close ?

Untitled.jpg

dp2.jpg

[curious aardvark]

lol - geometry was never my strong suite.

so you've got a square base with 8 triangles vertically mirrored to another 8 triangles and a square top ?

Ah - do you perchance know the actual angles of those triangles ?
That would probably help.

Actually what I need is the width of the base of the trinagles and the height of the triangle from the centre line to the apex.
That'll give me a proportionally corrext sized triangle. Which I can then rotate and tilt to make the actual shape.
In theory anyway :-)

[Griffinmcg]

I don’t know the actual degree of those angles but I can try to figure that out.

[Griffinmcg]

So the base is a 3” x 3” square, and it is 6” tall. So I think all those angles should be an even 60 degrees?