22-02-2019
Mathematics

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Need help with 5. Part C

Need help with 5 Part C class=

Respuesta :

sqdancefan sqdancefan

05-03-2019

Answer:

BA = 12

Step-by-step explanation:

All the right triangles are similar, so the ratio of hypotenuse to long side is a constant. In particular ΔABC ~ ΔDBA, so ...

hypotenuse/long-side = BC/BA = BA/BD

Cross multiplying gives ...

BA² = BC·BD

BA = √(BC·BD) = √(16·9)

BA = 12

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