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प्रश्न
Calculate the unknown marked angles of the following figure :
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उत्तर
We know that the sum of three angles of a triangle is 180°, therefore
In figure,
90° + 30° + x = 180°
⇒ 120° + x = 180°
⇒ x = 180° − 120° = 60°
Hence x = 60°
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