1 In Fig 6 17 i and ii DE BC Find EC in i and AD in ii 3 cm B AM AB 1 5 cm D i 1 cm E C B 7 2 cm ii Fig 6 17 2 E and F are points on the sides PQ and PR respectively of a APQR For each of the following cases state whether EF QR 1 PE 3 9 cm EQ 3 cm PF 3 6 cm and FR 2 4 cm ii PE 4 cm QE 4 5 cm PF 8 cm and RF 9 cm iii PQ 1 28 cm PR 2 56 cm PE 0 18 cm and PF 0 36 cm 3 In Fig 6 18 if LM CB and LN CD prove that AN AD 4 In Fig 6 19 DE AC and DF AE Prove that BF BE FE EC B 1 8 cm E M 5 4 cm C B F E D Fig 6 18 n
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