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Construct OYParallel to AB and CD
angle AOY+angle BAO= 180 ( linear pair)
angle AOY = 180° - 130°
angle AOY = 50°
angle YOC +angle DCO= 180 ( linear pair)
angle YOC= 180° - 120°
angle YOC= 60°
angle YOC + angle AOY= X°
50+ 60= X°
110° = X°
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