The Unicursal Hexagram
This type of hexagram is called 'unicursal' as it can be drawn out without lifting the pen from the paper. Each of its 6 points can fit into a perfect circle, with each point touching the circle, as with a pentacle.
It was thought to have been designed by the Golden Dawn but there are suggestions that it has been recorded in centuries old archives, although its meaning in that context is not clear. A five petaled flower was later added to the center of it by Aleister Crowley and it is now widely used as a symbol of religious identification for the Thelemic Religion.
In ritual its use is for both invoking and banishing, depending on which way it is drawn - starting at the top point and drawing down at a diagonal to the right to make the second point is for invoking, starting at the top and going diagonally left is for banishing but the intent MUST be made clear BEFORE drawing it!!
It is also used as a symbol for protection in the form of an amulet.
The nine pointed star
"Enneagram." The meaning of the word comes from the Greek word ennea, nine & grammos, to be written or drawn. There are a probably quite a few meanings of the nine pointed star, or the enneagram, when it comes to symbolism. I only know of two