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Question 18 : ABCD is a quadrilateral inscribed in a circle with centre O. If ∠COD = 120° and ∠BAC = 30°, then the value of ∠BCD (in degrees) is [TITA]

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ABCD is a quadrilateral inscribed in a circle with centre O.

∠COD = 120°

∠BAC = 30°

∠BOC = 60° (twice that of ∠BAC)

BOD is a straight line (60 + 120) = 180° or BD is the diameter of the circle

∠BOD = 180°

We have to find the value of ∠BCD

∠BCD is an angle in a semicircle = 90°

The question is **"ABCD is a quadrilateral inscribed in a circle with centre O. If ∠COD = 120° and ∠BAC = 30°, then the value of ∠BCD (in degrees) is [TITA]" **

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