एक चक्रीय चतुर्भुज PQRS में, ∠PQR और ∠QRS के मान क्रमशः 30° और 50° हैं। ∠SPQ और ∠RSP के बीच का अंतर कितना है?

  1. 30° 
  2. 50°
  3. 20°
  4. 80°

Answer (Detailed Solution Below)

Option 3 : 20°
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Detailed Solution

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दिया गया है:

∠PQR = 30°

∠QRS = 50°

प्रयुक्त अवधारणा:

एक चक्रीय चतुर्भुज में, 

सम्मुख कोणों का योगफल = 180° 

गणना:

∠PQR + ∠RSP = 180°      (∵ सम्मुख कोणों का योगफल = 180°)

⇒ 30° + ∠RSP = 180°

⇒ ∠RSP = 150°

∠QRS + ∠SPQ = 180°      (∵ सम्मुख कोणों का योगफल = 180°)

⇒ 50° + ∠SPQ = 180°

⇒ ∠SPQ = 130°

⇒ ∠RSP - ∠SPQ  = 20°

∴ ∠SPQ और ∠RSP के बीच का अंतर 20° है। 

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