You can put this solution on YOUR website! sketch nonadjacent supplementary angles where one angle measures 42
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It says "sketch". The measurements don't have to be perfect.
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Sketch the 42 degree angle opening to the right.
Sketch a second angle of 180-42 = 138 degrees opening to the right.'
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The sketches must NOT share a side and open in opposite directions..
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Cheers,
Stan