Making a 3D pentagram

What is a 3D pentagram? The only pentagram I know of is 2D.

Here are some http://en.wikipedia.org/wiki/Pentagram#Three-dimensional_figures"....

 

I think you're going to need to elaborate.

 

Can you supply a diagram or a photo?

These diamonds, are you basically making 5 of them and joining them into a star pattern? The central angle would be 360/5 = 72 degrees. It is not the same as the angle at the outer point, which will be different if you want them to be true pentagrams, as opposed to simple stars.

See attached samples of different five-sided shapes.

I suspect you are trying to construct #1. But if you use true diamond shapes (opposite angles are equal), you will end up with #2.

 

Ah. But otherwise, does it look like #1 in my diagram?

How much is it suppsoed to bend up?

 

Is the centre raised with the points set back? Or are the centre and points in the same plane? i.e. if you lie it flat on the table, will the centre touch the table?


[ EDIT: Nevermind, the centre and points can't all touch ]

If you want to simply do a rough trial, then try this:


Take one of the diamonds I diagrammed.
On paper, scale it up to the size you want.
Add about 5% to its width (i.e. if your diamond is 10" from side-to-side, make it about 10.5")

This should get you a diamond whose inner angle is a now little more than 72 degrees. You will need to crimp it down the middle to make it 72 degrees, at which point 5 of them will complete a circle.