Question

DE||BC. If DE= 5cm, BC= 8cm and AD= 3.5cm, find AB?

Answer 1

Hope help you
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Answer 2

we know if a side // to any one side of triangle diveds the two lines in same ratio...

therefore..

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AD/AB = DE/BC

3.5/AB = 5/8

AB= 8×3.5/5

AB= 5.6

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