Explain the following: Circle          (ii)   Radius      (iii)   Centre Diameter     (v)  Chord        (v)  Interior of a circle

Explain the following: (i) Circle (ii) Radius (iii) Centre (iv) Diameter (v) Chord (vi) Interior of a circle

From figure, name the following (centre P). (i) Chord (ii) Diameter (ii) Radius (iv) Centre angle

A diameter of a circle is a chord that ..... the centre of the circle.

Fill in the blanks: (i) The diameter of a circle is … times its radius (ii) The diameter of a circle is the … chord of the circle. (iii) The diameter of a circle pass through…. (iv) A chord of a circle is a line segment with its end points on the … (v) If we join any two points on a circle by a line segment, we obtain… (vi) A radius of a circle is a line segment with one end at …. and the other end at…. (vii) All radii of a circle are… (viii) The diameters of circle are… (ix) The total number of diameters of circle is… (x) Every point on a circle is…from its centre.. (xi) A chord of a circle contains exactly….points of the circle.. (xii) A diameter is the longest… (xiii) Concentric circles are circle having….

The radius of the circle having centre at (2, 1) whose one of the chords is a diameter of the circle :

In given figure, O is the centre of the circle. A chord, which is not the diameter of the circle is

In each of the following , state it the statement is true (T) or false (F): (i) Every circle has a centre. (ii) The centre of a circle is a point of the circle. (iii) Any two radii of a circle make up diameter. (iv) Every chord of a circle is parallel to some diameter of the circle. (v) A circle is symmetric about each of its diameter. (vi) The diameter is twice the radius. (vii) A radius is a chord of the circle. (viii) Concentric circles have the same radii. (ix) The nearer a chord to the centre of a circle, the longer is its length.

In the given figure, O is the centre of the circle. Name a chord, which is not the diameter of the circle.

Write True or False: Give reasons for your answers. (i) Line segment joining the centre to any point on the circle is a radius of the circle. (ii) A circle has only finite number of equal chords. (iii) If a circle is divided into three equal arcs, each is a major arc. (iv) A chord of a circle, which is twice as long as its radius, is a diameter of the circle. (v) Sector is the region between the chord and its corresponding arc. (vi) A circle is a plane figure.