Step-by-step explanation:
∠ACB=90∘
[∠ from diameter]
In ΔACB
∠A+∠ACB+∠CBA=180∘
∠CBA=180∘
−(90+30)
∠CBA=60∘ (1)
In △OCB
OC=OB
So, ∠OCB=∠OBC
[The sides are equal]
∠OCB=60∘
∠OCD=90∘
∠OCB+∠BCD=90°
∠BCD=30∘ (2)
∠CBO=∠BCO+∠CDB
[external ∠ bisectors]
60=30+∠CDB
∠CDB=30° (3)
from (2) & (3)
BC=BD
[The ∠.S are equal]
Answer:
10,000,000,000,000,000,000,000,000,000,000,000,000,000,000
10,000,000,000,000,000,000 x 1,000,000,000,000,000,000,000,000 =
0.2 = 2/9
Hope my answer has helped you!
The picture is really blurry, i can't see the questions