If the ratio of the interior angle to the exterior angle of a regular polygon is 7:2,then the number of sides is : A) 8 B)9 C)10 D)11 Also give me the solution

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In a regular polygon if the ratio of exterior angle to its interior angle is 2 : 7, then the polygon has ___ sides.

7 : 2

2 : 7

Calculate the number of sides of a regular polygon, if :

(i) its interior angle is five times its exterior angle.

(ii) the ratio between its exterior angle and interior angle is 2 : 7.

(iii) its exterior angle exceeds its interior angle by $60^{o}$ .

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