I don't really understand what the Exterior Angle Theorem is.
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 Can someone help me try to understand what the Exterior Angle Theorem is more clearly? I'm kinda confused. 
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 The exterior angle theorem states that the sum of the measure of two angles in a triangle equals the measure of the exterior angle of the third. Here is a quick diagram I made: 
  
 This is because the sum of the angles in a triangle is 180, and \( d = 180-c. \) However, \( a+b+c = 180\), so \(a+b=180-c\). Since both equal \(180-c\), they must be equal.
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 Thank you for explaining that. I understand it now. 
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 you're welcome! 
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 We are the fruits  
 And a vegetable
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 loolololol 
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 We are da best fruits and vegetables 
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 Is it the one that says PROF.LOH AGREED TO WEAR A GREEN SHIRT...? 
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 Ya, I already upvoted it. 
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 potato art baby 
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