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प्रश्न
Find the number of sides in a regular polygon, if its interior angle is: 135°
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उत्तर
No. of. sides = n
Each interior angle = 135°
`("n" - 2)/"n" xx 180^circ = 135^circ`
180n - 360° = 135n
180n - 135n = 360°
45n = 360°
n = 8
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