smashingexams.com.sgsmashingexams.com.sg/exampapers/AMaths/AMathsP2/Catholic...OG is perpendicular...
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smashingexams.com.sgsmashingexams.com.sg/exampapers/AMaths/AMathsP2/Catholic...OG is perpendicular to AB and OG intersects A D at E. OG produced and BD produced intersect at C. (i)