About Shape!
It's violent as a program, scabious fillets, multiple extrusions and boolean operations etc... but requires a certain "dexterity" for all that is on screen selection and choice of functions! :)


Objects from an XY frame were exploded once to separate and make them independent. Otherwise no multiple intersections!
The face of the pyramid is taken as a "cutting or not"object.
Clicking CTRL several times shows the different Cutting options.
We stop here on the cutting without keeping the extruded sharp object!

If one side of the pyramid is selected, you must hold down the CTRL key to select the complete pyramid and Skip/Drag to the different function icons!