एक त्रिभुज के दो अंतः कोण 40° और 70° हैं। तीसरे शीर्ष पर बनने वाला बाह्य कोण क्या होगा?
A150°
B70°
C110°
D140°
Answer & Solution
Correct answer: C. 110°
तीसरा अंतः कोण 180° − (40° + 70°) = 70° है और इसका रैखिक युग्म बाह्य कोण = 180° − 70° = 110° होगा (या बाह्य कोण = 40° + 70° = 110°)।
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