4 In Fig 6.16,ifytthen prove that AOBis a lineB.ie – InterviewSolution

1.	4 In Fig 6.16,ifytthen prove that AOBis a lineB.ie
Answer» sum of angles around a point is 360°then x+y+z+w=360°also x+y=w+zso x+y+x+y=3602(x+y)=360x+y=180since sum of angles on line AOB is 180° so it is a st. line

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