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

Type: MCQ • Marks: 1

A. 60°

B. 80°

C. 110°

D. 70°

Explanation

Vertex angle = 180° - (55° + 55°) = 180° - 110° = 70°.

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Class 7th Ganita Prakash 1

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