1. In ΔABC, D and E are points on side AB and AC respectively. DE is parallel to BC. If lengths of AD, DB and DE are 9 cm, 6 cm and 5.4 cm respectively find length of BC?





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  • By: anil on 05 May 2019 02.13 am
    DE is parallel to BC => $$frac{AD}{AB} = frac{DE}{BC}$$ => $$frac{9}{9 + 6} = frac{5.4}{BC}$$ => $$frac{9}{15} = frac{5.4}{BC}$$ => $$BC = 15 imes 0.6 = 9$$ cm
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