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### Emne: (Videregående geometri>Emne 3

Modul 6: Sætninger omkring firkanters egenskaber

# Bevis: Diagonaler i et parallelogram

Sal beviser, at en firkant er et parallelogram, hvis og kun hvis dens diagonaler halverer hinanden. Lavet af Sal Khan.

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Forstår du engelsk? Klik her for at se flere diskussioner på Khan Academys engelske side.

## Video udskrift

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