Eli5 why do bees create hexagonal honeycombs?

Question

Why not square, triangle or circle?

In: 4542

Answer 1

A cell does start out as a circle. It then turns into a hexagon by the worker bee’s body heat, causing it to flatten where it meets its neighbouring cells.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3730681/