Mathematics

If two supplementary angles are in the ratio $$1:2$$, then the bigger angle is 


ANSWER

$$120^o$$


SOLUTION
Option $$(A)$$ is correct.
Two supplementary angles are in the ratio $$1:2$$
So, let two angles be $$x$$ and $$2x$$
Given that, angles are supplementary 
$$\therefore x+2x=180^o$$
$$\Rightarrow 3x=180$$
$$\Rightarrow x=\dfrac{180^o}{3}$$
$$\Rightarrow x=60^o$$
Therefore, bigger angle is $$2x=120^{\circ}.$$
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