What is the perimeter of a sector of a circle, if the angle subtended by the arc at the
centre is a right angle?
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A sector is said to be a part of a circle made of the arc of the circle along with its two radii. It is a portion of the circle formed by a portion of the circumference (arc) and radii of the circle at both endpoints of the arc. The shape of a sector of a circle can be compared with a slice of pizza or a pie. Before we start learning more about the sector, first let us learn some basics of the circle.
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