We've had the Instagram square grid since the app was created in 2010 and is considered to be a signature feature of the platform, so why the big change after 15 years?

Your perfect grid on your Instagram profile might soon be gone — if it isn't already. Instagram is rolling a big change this ...

This shape is drawn on a centimetre square grid. Work out the area of the shape. What is the area of this shape, if the area of each grid square is 1 cm 2? There are 10 squares contained in this ...