What does "the Pyramids" refer to in Egypt? How many pyramids are called 'the Pyramids'?

The pyramids in Egypt are the huge burial sites of some of the pharaohs from long ago.

http://en.wikipedia.org/wiki/Egyptian_pyramids

and

http://www.google.com/search?q=pyramids+in+egypt&hl=en&rlz=1C1GGGE_enUS379US379&prmd=imvns&tbm=isch&tbo=u&source=univ&sa=X&ei=n1JgULLBGof1igLn9YDoCw&ved=0CDQQsAQ&biw=1366&bih=643

ues

"the Pyramids" typically refers to the Giza Pyramids, which are located on the outskirts of Cairo, Egypt. These pyramids are some of the most famous and well-preserved pyramids in Egypt. There are three main pyramids at Giza, known as the Great Pyramids. They were built as graves for ancient Egyptian pharaohs during the Old Kingdom period. The three pyramids are named:

1. The Great Pyramid of Khufu (also known as the Great Pyramid of Cheops)
2. The Pyramid of Khafre
3. The Pyramid of Menkaure

There are also smaller pyramids and structures surrounding the Great Pyramids, such as the Sphinx and the pyramids of the queen consorts. However, when people mention "the Pyramids" in Egypt, they are usually referring to the three main pyramids at Giza.