एक आयत का विकर्ण आयत की एक भुजा की ओर 25 पर झुका हुआ है। इन विकर्णों के बीच बना न्यून-कोण है:

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RRC Group D Previous Paper 6 (Held On: 24 Sep 2018 Shift 1)
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  1. 25°
  2. 50°
  3. 55°
  4. 40°

Answer (Detailed Solution Below)

Option 2 : 50°
Free
RRB Group D Full Test 1
100 Qs. 100 Marks 90 Mins

Detailed Solution

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चूंकि आयत के विकर्ण एक दूसरे को प्रतिच्छेदित करते हैं,

⇒ AO = OB

⇒ ∠OBA = ∠OAB = 25° [∵ समान भुजाओं के विपरीत कोण बराबर होते हैं]

ΔAOB में कोण योग गुणधर्म से,

⇒ ∠AOB + ∠OAB + ∠OBA = 180°

⇒ ∠AOB + 25° + 25° = 180°

⇒ ∠AOB = 130°

रैखिक युग्म गुणधर्म से,

⇒ ∠DOA + ∠AOB = 180°

⇒ ∠DOA + 130° = 180°

⇒ ∠DOA = 50°

∴ दोनों विकर्ण एक दूसरे के साथ 50° का कोण बनाते हैं।

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