Easy Math Class 9 Level 7

If the base angles of an isosceles triangle are 55° and 55° then what is the vertex angle?

यदि समद्विबाहु त्रिभुज के आधार कोण 55° और 55° हैं तो शीर्ष कोण कितना होगा?

A 55° / 55° B 70° / 70° C 80° / 80° D 110° / 110°
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Correct Answer

B. 70° / 70°

Explanation

The total angle sum is 180° so the vertex angle is 180° - 110° = 70°.

त्रिभुज का कुल योग 180° है इसलिए शीर्ष कोण 180° - 110° = 70° है।

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