n Learning and Teaching Mathematics - On the area of an inscribed quadrilateral of a parallelogram

Volume 2019 Number 26
  • ISSN : 1990-6811


In LTM 24 Moshe Stupel presents an interesting proof without words. Starting with a parallelogram ABCD, construct quadrilateral KING with KN parallel to AB and CD, and G and I arbitrarily placed on sides AB and CD respectively. The area of quadrilateral KING is half the area of parallelogram ABCD.

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