In a ΔABC, D and E are points on the sides AB and AC respectively such that DE || BC. If AD/AB=15/18
and AE = 4 cm, then find EC.
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Answer:
AB/AD = AC/AE
AB/AD = (AE+ EC)/AE
18/15 = (4+EC)/4
18/15 * 4 = 4+EC
24/5 = 4+EC
24/5 - 4 = EC
(24-20)/5 = EC
4/5 = EC
EC= 0.8 cm
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