Q. 185.0( 2 Votes )

In Fig. 9.44, x + y =

A. 270

B. 230

C. 210

D. 190°

Answer :

By exterior angle theorem,


OCA + AOC = x

x = 80o + 40o

= 120o

AOC = DOB (Vertically opposite angle)

DOB = 40o

By exterior angle theorem,


y = BOD + ODB

= 40o + 70o

= 110o

Now, x + y = 230o

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