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Perimeter of a Polygon http://www.khanacademy.org/video/perimeter-of-a-polygon -------------------------------------------------------------- يتناول هذا الفيديو مثالاً لإيجاد محيط متوازي الأضلاع -------------------------------------------------------------- شكر خاص لمؤسسة شركاء في التنمية المستدامة -- فلسطين http://psdpal.org