07-02-2017
Mathematics

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Is this answer correct? :)

Is this answer correct class=

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07-02-2017

No, the answer is 21 since you must make the bottom triangle add up to 180, which the missing angle is 120. since it is vertical, the other side is as well 120 degrees. So now add 120+39=159 then subtract 180-159= 21. X=21

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