Ahh- it’s been busy! Hope I’m not late with this one 
For a while now I’ve been seeing these four triangle symbols:
[Pic from Pintrest]
Probably even before @Ashlynn showed off her awesome new elemental tattoo! 
While I know they represent each of the physical elements, I’ve been curious about the meaning behind each of the triangles. So for this challenge, I delved in deeper to do some learning! 
While some consider a fifth element of Spirit and/or the symbol for Unity/Balance/Aether 
, I’ll just be sticking with the 4 common triangles for this break-down.
As for why each triangle looks the way it does, Learn Religions says this is caused by their attributes: Moist/Dry and Warm/Cold:
[Picture from Learn Religions: The Five Elements]
I quickly realized that I opened Pandora’s Box with this one- the article has so much information breaking down each of the elements. It explains their properties and that their position in the chart is based on the complexities of how they relate to one another.
“In classical elemental systems, each element has two qualities, and it shares each quality with one other element.”
From Learn Religions: The Five Elements
I was able to learn a lot just by skimming through the article (it’s a long one!). If you share an interest in the symbols and like exploring more about the elements and how they interact- it’s worth a read!
Blessed be! 