hexagrams
A hexagram is a figure formed by six points or lines arranged in a six-pointed star. In geometry, it is commonly represented by two overlapping equilateral triangles, a shape also known as the star polygon {6/2}. The hexagram appears in various cultural and symbolic contexts, notably as the Star of David in Jewish iconography, though its historic uses extend beyond a single tradition and it can be found in art, architecture, and mysticism around the world.
In the I Ching, or Book of Changes, a hexagram refers to one of 64 six-line figures
Beyond I Ching, hexagrams are used primarily as symbols of balance, unity, and interrelation. In modern design