Can you solve this puzzle ( slightly OT)

the snipped-for-privacy@gmail.com gurgled happily, sounding much like they were saying:

Pick up the one on the right, and put it with it's short edge (2 o'clock in that pic) abutting the short edge (10 o'clock) of the other. The two points of the one on the left form two of the base corners. One point of the one on the right forms the third base corner, the other point the apex.

or easier, put the two square sides together and twist 90 degrees

Put the two rectangular faces together and rotate one ...

Absolute disgrace

Thx guys ( except one below) .I shall go and try it .I tried Google but forgot Wikipedia .

But why have you ended up with hundreds of these things? Until I saw your reply above I thought the other responders were barking up the wrong tree and you had to make a big pyramid using all of the bits...

David

Well yeah .That's what I originally thought these pieces were foras I'm sure the girl who gave them to me said that but I couldn't figure out how and when I did search last night I saw that 2 piece puzzle so thats why I posted this message but after receiving these replies I have tried to make a pyramid out of 2 pieces but altho' they do fit together as sugested they don't make a complete 2 piece pyramid so I'm back to where I was . It could well be that I need to use all the pieces but I have no idea where I should start .