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Question -

Find the angle which is equal to its supplement.



Answer -

Let the required angle be x°.
∴ it supplement = (180 – x)°
Now, x = 180 – x
⇒ x + x = 180
⇒ 2x = 180°
∴ x=180/2=90∘
Thus, the required angle is 90°.

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