The pyramid shape path of the Sun

If the Earth was truly rotating on its axis away from the Sun we should assume that the Sun’s path would be the same shape as the Earth spherical surface, in other words a large semi circle in the sky.
https://www.pbslearningmedia.org/resource/buac18-35-sci-ess-daylightsunpath/daylight-hours-and-the-suns-apparent-path/