TITLE: How would you explain why $e^{i\pi}+1=0$ to a middle school student?
QUESTION [24 upvotes]: Hi I was asked by a friends child who is in middle school why $e^{i\pi}+1=0$. Now I couldn't think of a way to explain it so he would understand. Albert Einstein once said “If you can't explain it simply, you don't understand it well enough” so how would I explain it.

REPLY [4 votes]: This picture helped him understand