ΔABC मध्ये, लंब AG, BH आणि CI हे एकमेकांना O येथे भेटतात. जर ∠B = 44°, ∠C = 66°, ∠BOC चे मूल्य किती?

  1. 110° 
  2. 70° 
  3. 90°
  4. 180°

Answer (Detailed Solution Below)

Option 1 : 110° 
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Detailed Solution

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दिलेले आहे:

ΔABC मध्ये, लंब AG, BH आणि CI हे एकमेकांना O येथे भेटतात.

∠B = 44°, ∠C = 66°

वापरलेली संकल्पना:

त्रिकोणाच्या तीनही कोनांची बेरीज 180° असते.

लंब ज्या बिंदुला भेटतात त्याला लंबसंपात म्हणतात.

दिलेल्या बाजूमुळे लंबसंपातपाशी तयार झालेला कोन = [180° - (दिलेल्या बाजूचा विरुद्ध कोन)]

गणना:

त्रिकोणाच्या बेरीज गुणधर्मानुसार,

∠A + ∠B + ∠C = 180°

⇒ ∠A + 44° + 66° = 180°

⇒ ∠A = 180° - 110°

⇒ ∠A = 70°

दिलेल्या बाजूमुळे लंबसंपातपाशी तयार झालेला कोन = [180° - (दिलेल्या बाजूचा विरुद्ध कोन)]

⇒ ∠BOC = 180° - 70° = 110°

∴ ∠BOC = 110°.

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