I had to reason about this, and from my knowledge about triangle inequality. It explains why 1,2,3 if false

Nice! And yes, a facepalm for ToLower() twice for myself :)

Easy kata, ありがとう。

thanks man you saved me

In my opinion they are supposed to know what a triangle is or at the very least to be able to figure it out.

in my opinion they should explain how to determine if something is a traingle or not

what is a number? help

Neither it elaborates what a triangle is, what numbers are, and many other primary school things.

Please, elaborate what is not clear?

Very useful feedback.

this kata is f ed up

I guess description is not fully clear, it confuses people

I did not expect this kata to blow up this much when originally posting it :D

I am surprise why people even think this is a math question. It's literally about putting toothpicks together in a shape.