The vertex of angle in circle does not always lie on the circumference of the circle.

AB is a diameter of a circle and 'C' is any point on the circumference of the circle .Then

AOB is the diameter of a circle. C is a point on the circumference of the circle. If /_OAC = 60^@ then find the value of /_OBC .

AB is a diameter of the circle with centre at O. R is any point on the circumference of the circle. If /_ ROA = 120^@ , then firnd the volue of /_RBO /

Prove that the internal bisector of any angle of a cyclic quadrilateral and the external bisector of its opposite angle intersect each other on the circumference of the circle.

The perimeter of the sector of a circle is equal to the circumference of the semi-circle of same radius . Find in circular measure the angle subtended at the centre by the bounding radii of the sector .

If the four vertices of a quadrilateral lie on the circumference of a circle , then it is called a …………. quadrilateral.

A wire of length 15 cm is bent so as to lie along the circumference of a circle of radius 25 cm . Find in degrees the angle which the wire subtends at the centre of the circle .

The locus of the mid-points of the chords of the circle of lines radiùs r which subtend an angle pi/4 at any point on the circumference of the circle is a concentric circle with radius equal to (a) (r)/(2) (b) (2r)/(3) (c) (r )/(sqrt(2)) (d) (r )/(sqrt(3))

Only "________" tangent can be drawn at any point on the circumference of a circle.

Which of the following points lies on the circumference of the circle (x-2)^(2) + (y+3)^(2) = 25 ?