@RZ923 Thanks for asking! I haven't gotten a chance to reply to this yet, but in the meantime, there are some more forum posts about this same topic ~~ Please check them out! 🙂

https://forum.poshenloh.com/topic/84/formula-to-figure-out-why-the-equilateral-triangle-area-formula-works

https://forum.poshenloh.com/topic/96/re-question