sentence: All TVs have screens where the picture is viewed.
sentences_after: Screens also used to have rounded corners, but now they are usually flat rectangles with straight edges. It is a wider rectangle that looks more like the shape of a movie theatre screen. This is called widescreen. If a widescreen set was 30 cm tall, it would be 53 cm wide. For this to work best, TV shows also need to be made in widescreen.
concept_name: tv
headings: Television