Q. 185.0( 2 Votes )

In Fig. 9.44, x + y =


A. 270

B. 230

C. 210

D. 190°

Answer :

By exterior angle theorem,

In


OCA + AOC = x


x = 80o + 40o


= 120o


AOC = DOB (Vertically opposite angle)


DOB = 40o


By exterior angle theorem,


In


y = BOD + ODB


= 40o + 70o


= 110o


Now, x + y = 230o

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