janethlopez1208 janethlopez1208

23-01-2018
Mathematics

contestada

Can anyone please help!!!
What’s the length of CD?

Can anyone please help Whats the length of CD class=

Respuesta :

sqdancefan sqdancefan

19-03-2019

Answer:

CD = 3

Step-by-step explanation:

Triangles CBA and CDE are similar (AA), so the side lengths are proportional.

(15-x)/20 = x/5

Multiplying by 20 gives ...

15 -x = 4x

15 = 5x . . . . . . add x

3 = x . . . . . . . . divide by 5

CD = x = 3

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