Mathematics

Find the angle which is equal to its supplement.


SOLUTION
Let $$x$$ be two equal angles of its supplement.
Therefore, $$ x + x =180^o$$   [Supplementary angles] 
$$ \Rightarrow 2x=180^0 $$
$$ \Rightarrow x=\dfrac {180^o}{2}= 90^o$$
Thus, $$90^o$$ is equal to its supplement. 
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