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Kaikerscupcake
Hey there! :D

All the angles in a triangle are equal to 180 degrees.

So,

47+71+x=180

118+x=180

Subtract 118 on both sides. 

x= 62

I hope this helps!
~kaikers
TheAnswerKing
180° in a complete triangle. So add the given angles up (47 + 71 = 62) Degrees

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