Trikona

n Śrīvidyā, Devī is the bindu, the inner triangle, and all of the Śrīcakra. She is the orgasmic energy of the bindu and the explosive power of emission. She is the very essence of creation, ecstatically throbbing in every bit of it.

We see that all of creation occurs in triads, being pervaded by the three-fold nature of Devī—reality/truth (sat), consciousness (cit) and bliss (ānanda). Since her exquisite beauty pervades all of existence, she is known as Mahātripurasundarī (the great beauty of the three cities, where the cities are all the triads of creation).

-Glorious Alchemy (Living the Lalitha Sahasranamam) by @kavitha_chinnaiyan