12-01-2020
Mathematics

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The triangles in the figure are similar. What is the length of CD?

I know the answer is 21 but idk why can someone explain?

The triangles in the figure are similar What is the length of CDI know the answer is 21 but idk why can someone explain class=

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kenlingdad kenlingdad

12-01-2020

Answer:

In steps

Step-by-step explanation:

ΔABE ~ ΔACD

AB / AC = BE / CD

3 / 9 = 7 / CD

CD = (9 x 7) / 3 = 63 / 3 = 21

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