D and E are points on the sides AB and AC of a triangle abc such that AD = 3cm, BD = 5cm, BC = 12.8cm, and DE ║ BC then length of DE in cm is ?
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Use this method, it's not a correct answer so don't write exact this but use method
plz f.o.l.l.o.w m.e
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Step-by-step explanation:
AD = 3 cm , BD = 5 cm cm, BC = 12.8 cm
= AD / AB = DE / BC -----------> (B.P.T.)
= 3 / 3+5 = DE / 12.8
= DE = 3 * 12.8 / 3+5
= DE = 38.4 / 8
= DE = 4.8 cm
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