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Use the Exterior Angle Theorem to find the measure of each angle.

 

 Apr 11, 2020
 #1
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DEC = 180 - 118 = 62o

 

Then all the angles of a triangle sum to 180o

 

3y+5       +     8y+3       + 62      = 180     You should be able to get it from here...!   cheeky

 Apr 11, 2020

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