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tatuchka [14]
3 years ago
5

What is the value of x? 72 84 96 252 helpppp please

Mathematics
2 answers:
Art [367]3 years ago
7 0
Its 72, which is answer A
hammer [34]3 years ago
7 0

Answer: 72

Step-by-step explanation:

We know that<em> the sum of all exterior angles of a polygon is 360°.</em>

Therefore, by the given picture, we have

(x+12)^{\circ}+57^{\circ}+108^{\circ}+60^{\circ}+51^{\circ}=360^{\circ}\\\\\Rightarrow x+288^{\circ}=360^{\circ}\\\\\Rightarrow\ x=360^{\circ}-288^{\circ}\\\\\Rightarrow\ x=72^{\circ}

Hence, the value of =72

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