They all look the same!! How to solve this simple impossible puzzle - Triangle Vinco  

Cool little puzzle

I found this one quite hard. This is the no tray version, I assume the version that comes with a tray might help guide the solver a little.

very fun to solve, thanks for laying it out at 0:47 so we can see each piece clearly

這個拼圖的最大缺點似乎是完成後不能固定啊！