3 years ago

How can I find angle C?

1 answer:

7 0

Recall all interior angles in a triangle add up to 180°, therefore

$\bf \stackrel{A}{x+40}~~+~~\stackrel{B}{2x-5}~~+~~\stackrel{C}{3x-17}~~=~~180
\\\\\\
6x+18=180\implies 6x=162\implies x=\cfrac{162}{6}$

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