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Solve for x in the diagram below.

 

 Jul 9, 2020
 #1
avatar+26620 
+1

The three angles    x+12       100   and    x   add to a straight line    180o

 

x+12   +  100    + x = 180        You SHOULD be able to calculate 'x' from here on......cheeky

 Jul 9, 2020
 #2
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xº = (80º -12) / 2

 Jul 9, 2020

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