Which rectangle has the greatest area? https://cdn.kastatic.org/ka-perseus-graphie/d9c0b75af114d1c6006d38ef6ed92c1f95f380f7.svg https://cdn.kastatic.org/ka-perseus-graphie/45d039452ae5980a433584ea555de1dc70cf60f4.svg How do we know which rectangle has the greatest area?