Q.12 In the below figure ABCD is parallelogram AE DC and ​CF  AD. If AB=16cm, AE=8cm  and CF=10cm, Find AD  

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12.8 cm
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Area of parallelogram = base * height => AE*CD = CF * AD =>AD = AE * CD/ CF =>AD = 8*16/10 = 64/5 = 12.8 cm
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