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Problem involving angle derived from square and circle http://www.khanacademy.org/video/problem-involving-angle-derived-from-square-and-circle --------------------------------- يتناول هذا الفيديو مسألة توضح طريقة اشتقاق الزوايا وقياساتها من رسم لمربع ودائرة ---------------------------------- شكر خاص لمؤسسة شركاء في التنمية المستدامة -- فلسطين http://psdpal.org