If x° and 4x° are supplementary angles then the value of x is
If x° and 4x° are supplementary angles then the value of x is
A) 144
B) 18
C) 36
D) 180
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Correct option is (C) 36
Given that \(x^\circ\) and \(4x^\circ\) are supplementary angles.
\(\therefore\) \(x^\circ+4x^\circ=180^\circ\)
\(\Rightarrow\) \(5x^\circ=180^\circ\)
\(\Rightarrow\) \(x^\circ=\frac{180^\circ}5=36^\circ\)
\(\therefore\) x = 36
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