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3 years ago

Can someone also explain how to get the answer?

Mathematics

2 answers:

max2010maxim [7]3 years ago

8 0

$\dfrac{(n-2)\cdot180}{n}\\\\
\dfrac{(18-2)\cdot180}{18}=16\cdot10=160$

kherson [118]3 years ago

4 0

Look at the picture

$\beta=360^o:18=20^o\\\\2\alpha+\beta=180^o\ (a\ triangle)\\\\2\alpha+20^o=180^o\ \ \ |subtract\ 20^o\ from\ both\ sides\\\\2\alpha=160^o\\\\2\alpha\ is\ an\ interior\ angle.\\\\Answer:\boxed{160^o}$

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<u>Answer:</u>

<u>Step-by-step explanation:</u>

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