Medium Math Class 9 Level 7

In an isosceles triangle each base angle is 47°. What is the vertex angle?

समद्विबाहु त्रिभुज में प्रत्येक आधार कोण 47° है तो शीर्ष कोण कितना होगा?

A 76° / 76° B 86° / 86° C 94° / 94° D 96° / 96°
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Correct Answer

B. 86° / 86°

Explanation

The angle sum is 180° so the vertex angle is 180° - 94° = 86°.

त्रिभुज का योग 180° है इसलिए शीर्ष कोण 180° - 94° = 86°।

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