The Trinities

All geometry can be reduced to 3 fundamental shapes:
Triangle, Square, Circle

Similarly there are many such trinities:
Geometry: Triangle, Square, Circle
Trinity = Son, Father, Holy spirit
Light = Red, Green, Blue
Sound: AA, UU, MM
States: Body Mind Energy
States: Gross Subtle Causal
States: Waking, Dreaming, Deep sleep
Levels of existence: Vishva, Taijasa, Prajna
Fires/Agnis: Jataragni, Chitagni, Bhutagni
Gods: Brahma, Vishnu, Shiva
Goddesses/Devis: Durga, Laxmi, Saraswati
Nadis: Ida, Pingala, Sushumna
Dimensions of Shiva: Rudra, Hara, Sadashiva
Astronomy: Earth, Moon, Sun
Gunas: Tamas, Rajas, Sattva
Evolution: Ego, Soul, God
Elements: Carbon, Oxygen, Nitrogen