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Yet more characterisations of parallelograms

Published online by Cambridge University Press:  03 July 2023

Mowaffaq Hajja  and
Panagiotis T. Krasopoulos
Mowaffaq Hajja
Affiliation:
P. O. Box 388 (Al-Husun), 21510 Irbid – Jordan e-mail: mowhajja1234@gmail.com, mowhajja@yahoo.com
Panagiotis T. Krasopoulos
Affiliation:
Department of Informatics, KEAO Electronic National Social Security Fund 12 Patision St. 10677 Athens – Greece e-mail: pan_kras@yahoo.gr, pankras@teemail.gr
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This article, like our previous one [1], combines known and new characterisations of parallelograms. Both can be thought of as additions to Martin Josefsson’s series on ‘characterisations of’ and ‘properties of’ various types of quadrilaterals – a series that does not include parallelograms. Josefsson’s publications can be found listed in [2], [3] and [4]. For the importance of characterisations in geometry, see [5].

Type
Articles
Information
The Mathematical Gazette , Volume 107 , Issue 569 , July 2023 , pp. 225 - 233
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Copyright
© The Authors, 2023. Published by Cambridge University Press on behalf of The Mathematical Association

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