)201tnd all the aalexăă

1.	)201tnd all the aalexăă
Answer» let the ratio be x so angle AOD = 4x and BOD = 5x BOD + AOD = 180 ( linear pair)4x+5x = 1809x = 180x = 180/9 = 20so AOD = 4× x = 4 × 20 = 80and BOC = 80 (vertically opposite angle) BOD = 5x = 5× 20 = 100soAOC = 100 by vertically opposite angle

Answer»

let the ratio be x so angle AOD = 4x and BOD = 5x BOD + AOD = 180 ( linear pair)4x+5x = 1809x = 180x = 180/9 = 20so AOD = 4× x = 4 × 20 = 80and BOC = 80 (vertically opposite angle)

BOD = 5x = 5× 20 = 100soAOC = 100 by vertically opposite angle

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