If the chord joining the points `(2,-1), (1,-2)` subtends a right angle at the centre of the circle, then its centre and radius are

If the chord joining the points (1,-3),(-3,1) subtends a right angle at the centre of the circle,then equation of the circle is

The line join of the points (2,3) and (-1,5) subtends a right angle at P. If the locus of P is a circle then its radius is

The locus of the middle point of the chord of the circle x^(2)+y^(2)=1 such that the segment of the chord on the parabola y=x^(2)-x subtends a right angle at the origin,is a circle whose centre and radius respectively are

If a chord of a circle of radius 'r' subtends a right angle at the centre of the circle, then determine the area of the corresponding segment ?

The locus of the centre of the circle in which the chord joining the points (1,2) and (2,-1) subtends an anglt (pi)/(4) at any point on the circumference is

The locus of the point, the chord of contact of which wrt the circle x^(2)+y^(2)=a^(2) subtends a right angle at the centre of the circle is

The locus of the point, the chord of contact of which wrt the circle x^(2)+y^(2)=a^(2) subtends a right angle at the centre of the circle is

A chord of circle of a radius 28 cm subtends a right angle at the centre. What is the area of the minor sector?

A chord of a circle of radius 20 cm subtends a right angle at the centre find the corresponding minor segment.