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Question Number 186069 by TUN last updated on 31/Jan/23

Answered by HeferH last updated on 31/Jan/23

$$\alpha =10°$$

Commented by HeferH last updated on 31/Jan/23

Commented by HeferH last updated on 31/Jan/23

$$2(120°-4\alpha )+2\alpha =180°$$$$240°-6\alpha =180°$$$$\alpha =\frac{60°}{6}=10°$$

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