The Temple in Salt Lake has several inverted pentagrams as decorations. (To see a few, just google "lds temple salt lake inverted pentagrams" and click on images. Or click here)
According to Wikipedia, the inverted pentagram symbol is used in Neo-Paganism, Satanism, and magick, as well as Freemasonry.
How exactly did it become a symbol of the LDS church? (It seems like an odd symbol to use, given how it's used by others.) What does it represent according to LDS teaching?