Question

If O is the centre of the circle then find the value of x ​

Answer 1

Answer:

ans is 65 degrees

Step-by-step explanation:

• becoz accordingly(theorem says)
• ∠ADC=21∠AOC

(Angle subtended by a chord on mayor area is half of that subtended on center)

∴∠ADC=21×130=65∘

Now, ADCB is cyclic quadrilateral ⇒ 

Sum of opposite Angles is 180∘

∴∠ABC+∠ADC=180∘

∠ABC+65=180∘

∠ABC=115∘