In the given figure, ∠ OAB = 75°, ∠ OBA = 55° and ∠ OCD = 100°. Then ∠ ODC = ?

Question

Philoid · Accepted Answer

In triangle AOB,

∠AOB =180^o – 75^o – 55^o

= 50^o

∠AOB = ∠COD = 50^o(Opposite angles)

Now in triangle COD,

∠ODC =180^o – 100^o – 50^o

= 30^o