استخدمت مها إحدى الخرامات التي اقتنتها لتخريم ورقة دائرية كما في الشكل أدناه، إذا كانت النقطة ب مركز الدائرة الكبري وأب هو نصف قطر الدائرة الكبري وقطرا للدائرة الصغري، فما الكسر الممثل لنسبة المنطقة المظللة بالنسبة للدائرة الكبري؟؟
الإجابة هي: 2/5.
استخدمت مها إحدى الخرامات
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