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20-08-2019
Mathematics

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Need help with this geometry poblem

Need help with this geometry poblem class=

Respuesta :

20-08-2019

Answer:

17.5

Step-by-step explanation:

Because the lines of the trapezoid are parallel that means that side ratios are similar mainly: BC/AB = DE/EF

Which yields: DE = CB * EF/ AB = 18.5 * 8.5 / 9 ~ 17.5

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