Question

Can anyone help me to solve this problem.

answer is option no.1
Please explain.

Answer 1

Answer:

Solution is in the attachment:

Answer 2

Hi mate !!!!

The right answer is (a) 110°

Let, Angle B and C be X

In ∆ABC,

By angle sum property of triangles..

Angle A+ B + C= 180°

Angle B and C= 70°

Now angle OBC= Angle OCB = 70°/2 =35°

Now in ∆OBC,

by angle sum property of triangles,

angle B+C + O= 180°

Therefore, Angle BOC= 180°- 2×35°

= 180°-70°

= 110°

Hope it helps✌️✌️✌️

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