The Pentagram is a symbol of a star encased in a circle. Always with 5 points. like many other symbols in our History it has different meanings to different people, It has been adopted by meny cultures, people and groups. from wiccans, to devil worshippers (Inverted Pentagram) and even found in Freemasonry. For some the 5 points represent the 5 places that Christ was wounded.

and represents the Microcosmic man with his arms stretched out.

unfortunately many mainstream Religion follwers insist That the pentagram is a Evil Symbol only,connected to the Devil and Evil but In wicca or for Pagans right side up the pentagram represents God ruling over the world of matter. it represents the elements Spirit, Water, Air, Earth, and Fire and is a Symbol of protection

A Inverted pentagram  represents Satan or satanism. worn by Satanists or devil worshipers. which is a total different subject in itself