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PLEASE HELP!!! I don't understand ...... I would like an explanation as well.. Thanks
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PLEASE HELP!!!

I don't understand ......
I would like an explanation as well..
Thanks

PLEASE HELP!!! I don't understand ...... I would like an explanation as well.. Thanks-example-1
User Paflow
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1 Answer

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We can see that the triangle is symmetrical on both sides. CD is the line that goes from c to d. It should be the same as AD (a to d)

So... CD =9

I hope you understand.
User Zongze Wu
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