Question

0 is the center of the circle. If angle acb is 30 degree then find angle abc?

Answer 1

Hey mate here's your answer-

Here, O is the centre and AC is the radius of the circle.
And we know that angle in a semicircle is a right angle.

So, In ∆ ABC
angle A + angle B + angle C = 180° [angle sum property]
=> 90° + angle B + 30° = 180°
=> angle B = 180° - 120° = 60°

hence, angle ABC = 60°





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Answer 2

Answer:

angle ABC =60°

Step-by-step explanation:

brief answer in attached image