Modeling a 6 sided Piramid

Hi,

What's the easiest way to model a 6 sided Piramid in CATIA Part Design?

I managed to model the piramid, but I did it in such a cumbersome way that I believe it should be much easier (as I have also seen in other CAD systems).

Let's say the 6 ground ribs are 250 mm long and the height is 300 mm. (image as reference).

Does anyone have some good tips?

Thanks,

Marcel