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3 years ago

What is the length of CD in this diagram, ABC - EDC,

Mathematics

2 answers:

natima [27]3 years ago

8 0

Answer:

Option A is the right option.

solution,

∆ABC~∆EDC

$\frac{bc}{cd} = \frac{ac}{ec} \\ \:$

putting the values,

$\frac{20 - x}{x} = \frac{20}{5} \\ or \: 5(20 - x) = 20x(cross \: multiplication) \\ or \: 100 - 5x = 20x \\ or \: - 5x - 20x = - 100 \\ or \: \: - 25x = - 100 \\ \: or \: x = \frac{ - 100}{ - 25} \\ x = 4$

Hope this helps..

Good luck on your assignment..

Verdich [7]3 years ago

7 0

Answer:

it's 4. I just did this on Apex and the answer was 4

Step-by-step explanation:

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