Theorem:A line drawn through the end point of a radius and perpendicular to it is a tangent to the circle.

Theorem 10.4 : The line drawn through the centre of a circle to bisect a chord is perpendicular to the chord.

A tangent at any point of a circle is perpendicular to the radius through the _____.

Theorem 10.1 : The tangent at any point of a circle is perpendicular to the radius through the point of contact.

How many lines can be drawn through 6 points on a circle ?

The locus of the point from which perpendicular tangent and normals can be drawn to a circle is

How many lines can be drawn through 21 points on a circle?

A line through the centre O of a circle of radius 7cm cuts the tangent,at a point P on the circle,at Q such that PQ=24cm. Find OQ.

(Converse of Theorem 3) The line joining the centre of a circle to the mid-point of a chord is perpendicular to the chord.