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प्रश्न
Find the value of the unknown x in the following diagram:
उत्तर
The sum of all interior angles of a triangle is 180°. By using this property, these problems can be solved as follows:
x + 2x + 90° = 180°
3x = 180° − 90°
3x = 90°
x = `(90°)/3`
x = 30°
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