Answer :

(i) Double


By the theorem:-


The angle formed at the centre of a circle by an arc, is double of the angle formed by the same arc at any point on circle.


(ii) Equal


By the theorem:-


The angle formed at the centre of a circle by an arc, is double of the angle formed by the same arc at any point on circle.


(iii) 60°


The front angle is the angle subtended by the arc at any point on the circle in its opposite arc.


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<span lang="EN-USWest Bengal Board - Mathematics