Jia Earn Lim's answer to AA's Secondary 4 A Maths Singapore question.
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This is the 2nd page. For the last part considering it is worth 5m, a considerable working is likely required (as see here) to obtain the answer. I started by letting the coordinates of D be 2 variables (a, b) and formed 2 equations to solve simultaneously. One through the gradient formula for 2 perpendicular lines and the area of half the kite. Hope this explanation helps :)
Date Posted:
1 year ago
Thank , very clear explanation