Two extremities of a diameter of a circle are (-4, 3), (12, -1). Find the length of the chord made by the circle on the Y -axis.

If the extremities of a circle be (-5, 7) and (3, -11), find the centre of the circle.

The angle at the center of a sector of a circle of radius 42 cm is 120^@ .Find the length of the arc producing the sector and also the area of the sector of the circle.

Two concentric circles are of radii 5 cm and 3 cm.Find the length of the chord of the larger circle which touches the smaller circle.

The radius of a circle is 17.5 cm.Find the area of a sector made by an arc of length 44 cm.

The length of the diameters of some circles are given below.Find the circumferences of each of them.(i)14 cm

The length of the diameters of some circles are given below.Find the circumferences of each of them.(v)18 m

The length of the diameters of some circles are given below.Find the circumferences of each of them.(ii)42 cm

The length of the diameters of some circles are given below.Find the circumferences of each of them.(iv)20 m

The length of the diameters of some circles are given below.Find the circumferences of each of them.(vi)25 m

The length of the diameters of some circles are given below.Find the circumferences of each of them.(vii)45 cm