In Fig. O is the centre of the circle and ∠BDC = 42°. The measure

1.	In Fig. O is the centre of the circle and ∠BDC = 42°. The measure of ∠ACB is A. 42° B. 48° C. 58° D. 52°
Answer» Option : (B) ∠BDC = 42° ∠ABC = 90° (Angle in a semi-circle) In ABC, ∠ABC + ∠BAC = 42° (Angles on the same segment) 90o + 42° + ∠ACB = 180° ∠ACB = 48°

In Fig. O is the centre of the circle and ∠BDC = 42°. The measure of ∠ACB is A. 42° B. 48° C. 58° D. 52°

Answer»

Option : (B)

∠BDC = 42°

∠ABC = 90°

(Angle in a semi-circle)

In ABC,

∠ABC + ∠BAC = 42°

(Angles on the same segment)

90o + 42° + ∠ACB = 180°

∠ACB = 48°

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In Fig. O is the centre of the circle and ∠BDC = 42°. The measure of ∠ACB is A. 42° B. 48° C. 58° D. 52°

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