![]() Two or more than two circles having same centre are called concentric circles. The inscribed angle is also called an angle at the circumference. ![]() An inscribed angle is an angle made by any two chords of a circle at its circumference. ![]() Inscribed angleĪn angle subtended by an arc of a circle at its circumference is called an inscribed angle. ArcĪ part of the circumference of a circle is called an arc. The central angle and its opposite arc are equal in degree measure. It is the angle made by any two radii of the circle at its centre. The angle subtended by an arc at the centre of a circle is called its central angle. The greater one is called major sector and the smaller one is called minor sector. SectorThe area of a circle between any two radii is called its sector. The larger one is called major segment and the smaller one is called minor segment. SegmentsTwo unequal parts of a circle made by a chord are called its segments. SemicircleOne of two parts of a circle made by its diameter is said to be a semi-circle. Some definitionsĬhordA line segment joining any two points of the circumference is called the chord of a circle.ĭiameterThe longest chord passing through the centre of a circle is called its diameter. The fixed point is called the centre of the circle, the constant distance is called the radius of the circle and the bounding curve is called the circumference of the circle. The outer path is called the circumference.Ī circle can also be defined as a closed plane figure bounded by a curve such that every point of the curve remains equidistant from a fixed point. The fixed point is called the centre of the circle and the constant distance is called the radius of the circle. Well, a geometrical path traced out by a moving point in a plane such that its distance from some fixed point always remains equal or constant is called a circle. Before starting the discussion about Geometry: Circle we have to review the following concept.
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