একটি রম্বসের একটি বাহু এবং দুটি কর্ণের মধ্যে একটির প্রতিটিরই দৈর্ঘ্য 6 সেমি। রম্বসের ক্ষেত্রফলটি খুঁজে বের করুন (বর্গসেমি-তে)। 

This question was previously asked in
RRC Group D Previous Paper 2 (Held On: 18 Sep 2018 Shift 1)
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  1. 27√3
  2. 18
  3. 9√3
  4. 18√3

Answer (Detailed Solution Below)

Option 4 : 18√3
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Detailed Solution

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রম্বসের কর্ণগুলি হয় লম্ব দ্বিখন্ডক

মনে করুন ABCD একটি রম্বস এবং AC = 6 সেমি যার মধ্যবিন্দু O এবং বাহু AB = 6 সেমি

সুতরাং, ΔAOB তে,

⇒ AO2 + OB2 = AB2

⇒ (6/2)2 + OB2 = 62

⇒ 9 + OB2 = 36

⇒ OB2 = 27

⇒ OB = 3√3 সেমি

⇒ BD = 2 × OB = 6√3 সেমি

রম্বসের ক্ষেত্রফল = (1/2) × (রম্বসের কর্ণের গুণফল)

⇒ (1/2) × (6 × 6√3) = 18√3 বর্গসেমি

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