Q. 1004.0( 4 Votes )

In Fig. 5.53, find the value of BOC, if points A, O and B are collinear.


Answer :

AOD, DOC and COB are linear pairs.


So the sum of this three angles is 1800


(x-10) + (4x-25) + (x + 5) = 180


6x = 180 + 30


6x = 210


x = 350


BOC = (x + 5)0

= 400

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