Concentric Circles have the same______.

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.

The differential equation associated with the family of concentric circles having their centres at the origin is __________.

Find the area of a flat circular ring formed by two concentric circles (circles with same centre) whose radii are 9 cm and 5 cm.

Form the differential equation of all concentric circles at the origin.

Form the differential equation of all concentric circles at the origin.

Form the differential equation of all concentric circles at the origin.

Form the differential equation of all concentric circles at the origin.