questionedithistorytranslationsTranslate this question Globalquiz questions are translated by users for other users. English languageHow is this polygon called? (the one over the circles) squarerhomboidconcave squareconcave rhomboidIn this Ehrenstein illusion the sides of a square placed inside a pattern of concentric circles take an apparent curved shape. But in reality, the sides are straight.Debbie FoxShare and bring new players to the game!0Very uninterestingToo difficultPoorly writtenIncorrect or questionableCorrect this question0Very interesting! Polish languageJak nazywa się figura widoczna na tle koncentrycznych okręgów? kwadratromboidkwadrat wklęsłyromboid wklęsłyTo jest iluzja Ehresteina. Boki kwadratu wydają się wklęsłe, ale w rzeczywistości są proste.globalquiz.orgShare and bring new players to the game!0Very uninterestingToo difficultPoorly writtenIncorrect or questionableCorrect this question3Very interesting! German languageWie heißt die Figur vor dem Hintergrund konzentrischer Kreise? ViereckRhomboidViereck konvex Rhomboid konvex Wie heißt die Figur vor dem Hintergrund konzentrischer Kreise? Platz Rhomboid quadratisch konkav Rhomboid konkav Das ist die Illusion von Ehrenstein. Die Seiten des Quadrats erscheinen konkav, aber in Wirklichkeit sind sie einfach.FabienneShare and bring new players to the game!0Very uninterestingToo difficultPoorly writtenIncorrect or questionableCorrect this questionwikipedia → Viereck0Very interesting!