is the geometry used in the planning and construction of religious structures such as churches, temples, mosques, religious monuments, altars, tabernacles; as well as for sacred spaces such as temenoi, sacred groves, village greens and holy wells, and the creation of religious art. However, in sacred geometry, symbolic and sacred meanings are ascribed to certain geometric shapes, and certain geometric proportions.Wikipedia definition.
There are decks designed for this and dedicated to educating you for this. I personally find the decks too mathematical and tedious. I love the patterns in sacred art like mandalas and do use the healing fractal art in Path of the Soul deck by C. Harnish. I love the book by Lisa Tenzen Dolma -Healing with the mandalas, loving pics designed to heal your brain and energy. Works wonders. I swear by it.