Question

From the above given figure, DE parallel to BC. if AD = 3cm, DB = 4cm and BC = 14cm, find DE

Answer 1

DE \\ BC

So ;

`(AD)/(AB) = (DE)/(BC)`

AD = 3cm , BC = 14cm , DB = 4cm

AB = AD + DB

AB = 3 + 4 = 7 cm

`(AD)/(AB) = (DE)/(BC) \\ (3)/(7) = (DE)/(14) \\ DE = (14 * 3)/(7) = (42)/(7) = 6`

So ; DE= 6 cm

I hope I helped you^_^