If 'C' is the centre of the circle and A is the point on the circle, then AC is called _______ of the circle.

P, Q are the points on the circle. The part of the circle, PQ is called ________ of the circle.

Diameter a line segment passing through the centre of a circle and having its endpoints on the circle is called a diameter of the circle.

If A, B are the point on the circle. The line segment bar(AB) is called _______ of the circle.

The distance from the centre (O) of the circle to any point on the circle is called a............... of the circle,

In the figure, point A is the centre of the circle and its tangent CD touches the circle at point B, The radius of the circle is 4cm .If mangleBAC=30^@ , then find AC

If AOB is a diameter of a circle and C is a point on the circle, then AC^(2)+BC^(2)=AB^(2) .

If AOB is a diameter of a circle and C is a point on the circle, then AC^(2)+BC^(2)=AB^(2) .

In the figure, O is the centre of the circle . Seg AB is the diameter at the point C on the circle the tangent CD is drawn. Line BD is a tangent to the circle at point B. Show that seg OD || chord AC.

The centre of a circle lies in .............. of the circle.

Two chords of a circle, of lengths 2a and 2b are mutually perpendicular. If the distance of the point, at which the chords interect, from the centre of the circle is c (c lt radius of the circle), then the radius of the circle is :