As such we can say that a square is a  type of rectangle which is a type of shape. We can therefore pass a  square into any function that expects a shape or rectangle object  because a square is covariant with both a rectangle and a shape.
Format: Audio CD. The song Rule the World was featured in the motion picture Stardust which was released in the US this year. Although little known in the US, Take That is a top act in Europe and thing song has hit the top 10 list in the UK immediately after its release.
Rule Britannia. The patriotic song âRule, Britannia!, Britannia rule the wavesâ, is traditionally performed at the 'Last Night of the Proms' which takes place each year at the Royal Albert Hall. Originally, Great Britain was called âAlbionâ by the Romans, who invaded Britain in 55BC, but this later became âBritanniaâ.