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Question
In the given circle with diameter AB, find the value of x.
Solution
∠ ABD = ∠ ACD = 30° ....(∠s of same segment)
∠ADB = 90° ....(∠ in the semi circle)
In ΔADB,
x° + 90° + 30° = 180° ....(Sum of all ∠s of triangle)
x° = 180° - 120°
x° = 60°.
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