AB is a diameter of the circle with centre O, CD is chord of the circle, If ∠BOC = 120°, then the value of ∠ADC is ?
A. 42°
B. 30°
C. 60°
D. 35°
Answer: Option B
Solution (By Examveda Team)
From figure ∠BOC = 120
∴ ∠AOC = 180 - 120 = 60
So, ∠ADC = $$\frac{1}{2}$$∠AOC
(Angle made on circumference is half of the angle made on centre)
= $$\frac{1}{2}$$ × 60
So, ∠ADC = 30°
This Question Belongs to Arithmetic Ability >> Geometry
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In the given figure, ∠ONY = 50° and ∠OMY = 15°. Then the value of the ∠MON is
A. 30°
B. 40°
C. 20°
D. 70°
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