Question 213446
What is the supplementary angle of 150-a (degree)?


Step 1.  The supplementary angle is when two angles add up to 180 degrees.


Step 2.  For this example, 150-a+b=180 where b is the supplementary angle.


Step 3.  Then subtracting 150-a from both sides of the equation yields


{{{150-a+b-(150-a)=180-(150-a)}}}


{{{b=30+a}}}


Step 4.  The supplementary angle is b=30+a


I hope the above steps were helpful.


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Good luck in your studies!


Respectfully,
Dr J