9th Class Maths Solutions - Chapter 11 – Circle – Part 1 The permanent tip is called the centre and the stable distance is called the radius of the circle. A circle with centre O and radius r is denoted by C (O,r). A circle is the locus of a point which moves in a plane in such a way that its distance from a given fixed point is always constant. Terms Related to a Circle Radius : A Line segment joining the centre and a point on the circle is called its radius. The Plural of Radius is radii. In the given figure, OA and OB are radii of circle C (O, r) Circumference : The perimeter of a circle is called its circumference. Circumference = 2πr. Chord -A chord of a circle is a line segment joining any two points on the circle. In the given figure, PQ, RS, and AOB are the chords of a circle with centre O. Read complete chapter click 9th Class Maths Solutions - Chapter 11 – Circle – Part 1 Takshila Learning is an online education portal offers live classes f
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