Interlocking Traingles (Hexagon means, shiva and Shakti union) and Down ward pointing traingle is Shakti and Upward pointing traingle is Shiva and Circle is the totality of it.
What does Petals mean in Yantra?
EnglishLotus meaning in Yantra
In the second part of his explanation of Sri Cakra at 24:30, Guruji talks about the petals:
https://forum.amritananda.org/d/99-khagamala-stotra-and-sri-chakra-visualisations-by-guruji/3