This symbol holds deeper meaning than just a three sided shape you recognize from geometry class. In Christianity the triangles represents the trinity of Father, Son, and spirit. The triangle symbol can have different meanings depending on the way it faces.
The upward moving triangle is sometimes called the blade. It is a symbol of aspiration or rising up, male force, and fire. The triangle represents aspiration, rising force, and the male principal.
The downward pointing triangle is sometimes referred to as the chalice. It is the symbol of water (as it flows downward), the grace of heaven, and the womb. It is one of the most ancient symbols of female divinity. The triangle’s duality makes for a great accessory as you can change it up according to your mood.