Q. 365.0( 1 Vote )
In the given figure, ∠OAB = 75°, ∠OBA = 55° and ∠OCD = 100°. Then ∠ODC = ?
A. 20°
B. 25°
C. 30°
D. 35°
Answer :
In triangle AOB,
∠AOB =180o – 75o – 55o
= 50o
∠AOB = ∠COD = 50o(Opposite angles)
Now in triangle COD,
∠ODC =180o – 100o – 50o
= 30o
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