The area of the circle in which a chord of length 2a makes an angle `theta` at its centre is

The area of the circle in which a chord of length 2 a makes an angle theta at its centre is

Area of the circle in which a chord of length sqrt2 makes an angle pi/2 at the centre is

Area of the circle in which a chord of length sqrt2 makes an angle pi/2 at the centre,

Area of the circle in which a chord of length sqrt2 makes an angle pi/2 at the centre,

Area of the circle in which a chord of length sqrt2 makes an angle pi/2 at the centre,

Area of the circle in which a chord of length sqrt(2) makes an angle (pi)/(2) at the centre

Area of a circle in which a chord of length sqrt(2) makes an angle (pi)/(2) at the centre is

The radius of a circle us ‘r’ , an arc of length ‘l’ is making an angle theta , at the centre of the circle ,then theta =