18.In the given figure AD--1.28 cm, DB=2.56 cm, AE= 20.64 cm and DE || BC. Find EC
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DE will be parallel to BC, if EC = 41.28
Step-by-step explanation:
DE will be parallel to BC
if AD / BD = AE / EC
=> 1.28/2.56 = 20.64/EC
=> 1/2 = 20.64/EC
=> EC = 2 * 20.64
=> EC = 41.28
DE will be parallel to BC, if EC = 41.28 cm
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