

Prepare to get seriously annoyed.
Take a look at the two triangles below, both composed of the same four coloured shapes, arranged differently in formation A and B.
The same four shapes, right?
SO WHY IS THERE AN EMPTY SQUARE IN THE SECOND TRIANGLE?
Well, it's actually because rearranging the four shapes creates an ever-so-slightly different triangle.
In fact - neither 'triangle' is actually a triangle. Their 'hypotenuses' are actually made up of two lines, at different angles - so they are, in fact, quadrilaterals.
Triangle A has the lines creating a 'concave' shape, while Triangle B creates a 'convex' shape.
Get exclusive shortlists, celebrity interviews and the best deals on the products you care about, straight to your inbox.
Thus, Triangle B has a slightly larger area, which is exhibited in the extra empty square.
The gif below helps explain it.
BUT WE'RE STILL NOT SURE WE BELIEVE IT.

As Content Director of Shortlist, Marc likes nothing more than to compile endless lists of an evening by candlelight. He started out life as a movie writer for numerous (now defunct) magazines and soon found himself online - editing a gaggle of gadget sites, including TechRadar, Digital Camera World and Tom's Guide UK. At Shortlist you'll find him mostly writing about movies and tech, so no change there then.
-
Wimbledon's biggest ever upsets: 8 shocking tennis matches that no-one could have predicted
New balls, please...
-
The rarest animals, boxer shorts, and cosplaying Dune: 6 secrets from the stars of new Apple TV+ nature doc, The Wild Ones
It's like if David Attenborough and the Three Musketeers had a crossover