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علم آرزوها =ریاضی - مساحت و محیط اشکال هندسی
 
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مدیر وبلاگ : abbas jamali
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مساحت و محیط اشکال هندسی

  1) مساحت مـــربع = یـــک ضلع × خـــودش              

                 محیــط مـــربــــع = یک ضلع × 4

  2) مساحت مسـتطیـــــــل = طـول × عـرض        

                        محیط مستطیل = ( طول + عرض) × 2

  3) مساحت مثلث = ( قاعده × ارتــــــفاع ) ÷ 2         

                       محیط مثلث = مجموع سه ضلع

  4) مساحت مثلث متساوی الاضلاع = ( قاعده × ارتفاع ) ÷ 2        

              محیط مثلث متساوی الاضلاع = یک ضلع × 3

  5) مساحت مثلث متساوی الساقین = ( قاعده × ارتفاع ) ÷ 2         

               محیط مثلث متساوی الساقین= مجموع سه ضلع

  6) مساحت مثلث قائم الزاویه =  ( قاعده × ارتفاع ) ÷ 2            

                  محیط مثلث قائم الزاویه =  مجموع سه ضلع

  7) مساحت ذوزنقه = ( قاعده بزرگ + قاعده کوچک ) × نصف ارتفاع            

                            محیط ذوزنقه = مجموع چهار ضلع

  8) مساحت لوزی = ( قطر بزرگ × قطر کوچک ) ÷ 2                        

                محیط لوزی = یک ضلع × 4

  9) مساحت متوازی الاضلاع =  قاعده × ارتفاع       

             محیط متوازی الاضلاع =  مجموع دو ضلع متوالی × 2

  10) مساحت دایره = عدد پی ( 14/3 ) × شعاع × شعاع           

            محیط دایره =  عدد پی ( 14/3 ) × قطر

  11) مساحت کره = 4 × 14/3  × شعاع به توان دو 

 حجم کره = چهار سوم × 14/3 ×  شعاع به توان سه

    12) مساحت بیضی = (نصف قطر بزرگ × نصف قطر کوچک ) × 14/3                   

13 ) محیط چند ضلعی منتظم = یک ضلع × تعداد اضلاعش

 14 ) حجم مکعب مستطیل = طـول × عـرض × ارتفاع           

  حجم مکعب مربع = قاعده × ارتفاع ( طول یال×مساحت یک وجه)

15 ) حجم هرم = مساحت قاعده ی هرم × ارتفاع هرم× یک سوم 

16) مساحت جانبی استوانه = محیط قاعده × ارتفاع      حجم استوانه = مساحت قاعده × ارتفاع

سطح کل استوانه = سطح دو قاعده  + مساحت جانبی   ( مساحت مجموع دو قاعده + ارتفاع × پیرامون قاعده

17) مساحت جانبی منشور = مجموع مساحت سطوح جانبی    

مساحت کلی منشور = مجموع مساحت دو قاعده + مجموع مساحت سطوح جانبی

 

 

 

 





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       نظرات
چهارشنبه 7 اسفند 1392
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