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هندسة ثانوي اقوى مراجعة للصف الاول الثانوي (۳) (6) هدية D الكميات القياسية scalars: هی کمیات تتحدد تماما بمعرفة مقدارها فقط مثل الطول والمساحة والكثافة. ) الكميات المتجهة Vectors: هی کمیات تتحدد تماما بمعرفة مقدارها واتجاهها مثل الإزاحة والسرعة والقوة. القطعة المستقيمة الموجهة Directed Line Segment: هي قطعة مستقيمة لها نقطة بداية، نقطة نهاية، اتجاه. ع معيار القطعة المستقيمة الموجهة آب هو طول آب ويرمز لها بالرمز || آب || ن تتكافأ القطعتان المستقيمتان الموجهتان إذا كان لهما نفس المعيار ونفس الاتجاه. متجه الموضع Position Vector: متجه الموضع لنقطة معلومة بالنسبة لنقطة الأصل هو القطعة المستقيمة الموجهة التي بدايتها نقطة الأصل ونهايتها النقطة المعلومة. (۷) معيار المتجه Norm: هو طول القطعة المستقيمة الممثلة للمتجه. في الصورة القطبية لمتجه الموضع مر Polar Form: = (|| ||، 0) حيث 0 قياس الزاوية التي يصنعها المتجه مع اتجاه ثابت. ® المتجه الصفري يرمز له بالرمز و أو( - ) Zero Vector: يعرف و = (0، 0) بالمتجه الصفری حیث: || و || = || || = . وهو غير معین الاتجاه. المتجهات Vectors: هي عناصر المجموعة ح" مع عمليتي الجمع والضرب في عدد حقیقی المعرفتين عليها. ) خواص عملية جمع المتجهات: مغلقة - إيدالية - دامجة - و عنصر محايد - لكل أدح يوجد - دح. (۲) خواص ضرب متجه في عدد حقیقی مجانيم ی ' امام ...
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