The point where two lines meet is known as an angle. The value of c that makes m parallel to n is 15
From the given diagram, we can see that line m is parallel to line n.
The sum of the interior angles given in the diagram is supplementary, i.e
3x - 15 + 150 = 180
3x + 135 = 180
3x = 180 - 135
3x = 45
x = 45/3
x = 15
Hence the value of c that makes m parallel to n is 15
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