decagon
[اسم]
(geometry) a flat polygon with ten straight sides and ten angles

مُعشّر, مُعشّرة
Ex: The children were challenged to draw a decagon during their geometry class .
inversion
[اسم]
the act of turning something upside down or placing it in a vertical position

عكس, انقلاب
upheaval
[اسم]
a sudden and significant change or disruption, especially in relation to politics or social conditions

اضطراب, تغيير جذري

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