यदि एक त्रिभुज के दो कोणों की माप क्रमशः 60° और 80° है, तो इस त्रिभुज के तीसरे कोण की माप कितनी है?

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RRB Group D 22 Aug 2022 Shift 1 Official Paper
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  1. 50°
  2. 40°
  3. 70°
  4. 60°

Answer (Detailed Solution Below)

Option 2 : 40°
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दिया गया:

त्रिभुज के दो कोण = 60° और 80°

प्रयुक्त अवधारणा:

त्रिभुज के आंतरिक कोणों का योग = 180 ° 

समाधान:

त्रिभुज का तीसरा कोण = 180 °  - ( 60° + 80°)

= 180° - 140° 

= 40° 

अतः, सही विकल्प 2 है।

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