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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