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I need simple working out thank you for anyone helping me​

I need simple working out thank you for anyone helping me​-example-1

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Answer:

Explanation:

we know that the triangle to the center is an isosceles, so the two angle on the circle of that triangle are the same. both 41, so 41*2 =82

all the way around that isosceles triangle is 180 so

180-82 = 98

the angle at O is 98°

the arc BC spans 98°

angle 'a' is 1/2(98°)

a = 49°

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