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D and E are points on the sides AB and A...

`D` and `E` are points on the sides `AB` and `AC` respectively of a `triangle ABC ` such that DE||BC
(i) If `AD=3.6cm`,`AB=10cm` and `AE=4.5cm,` find `EC` and `AC` .
(ii) If `AB=13.3cm`,`AC=11.9cm` and `EC=5.1cm,`" find `AD`
(iii) If `(AD)/(DB)=(4)/(7)` and `AC=6.6cm` find `AE`
(iv) If `(AD)/(AB)=(8)/(15)` and `EC=3.5cm` find `AE`

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