20-02-2020
Mathematics

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Examine the following figure.
© 2016 StrongMind. Created
if DE || AC, what is the measure of length a?

Please ASAP ANSWER

Examine the following figure 2016 StrongMind Created if DE AC what is the measure of length a Please ASAP ANSWER class=

Respuesta :

amna04352 amna04352

20-02-2020

Answer:

21

Step-by-step explanation:

BDE and BAC are similar figures

BD/BA = BE/BC

18/(18+36) = a/(a+42)

18/54 = a/(a+42)

1/3 = a/(a+42)

a+42 = 3a

42 = 2a

a = 42/2

a = 21

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