I found this illusion from the web, I found it interesting so I posted it here. The question is which line is longer, AB or BC.

Do you know any geometrical illusion? One that involves mathematical concepts is more interesting. Feel free to post it here.

Parehas ang haba ng line $AB$ at line $BC$ sa tingin ko.......o di kaya.....nalinlang lang ako? hehehe....

Interesado ako nito ah....