viz [url=https://tube.geogebra.org/material/edit/id/2771715?doneurl=http%3A%2F%2Ftube.geogebra.org%2Fmaterial%2Fshow%2Fid%2F2771715&viewurl=%2Fbook%2Ftitle%2Fid%2F2625155%3Fdoneurl%3Dhttp%3A%2F%2Ftube.geogebra.org%2Fmaterial%2Fshow%2Fid%2F2771715%23material%2F2771715]Eukleidovy Základy ve školské matematice[/url]