Length of tangent from a Point to a Circle.

The length of the tangent from a point A at a circle,of radius 3cm, is 4cm. The distance of A from the centre of the circle is sqrt(7)cm(b)7cm (c) 5cm(d)25cm

The length of tangent from a point A at a distance of 5 cm from the centre of the circle is 4 cm. What will be the radius of the circle ?

The length of tangent from a point A at a distance of 12 cm from the centre of the circle is 9 cm. What is the radius of the circle ?

If the length of the tangent from a point (f,g) to the circle x^2+y^2=4 be four times the length of the tangent from it to the circle x^(2)+y^(2)=4x , show that 15f^(2)+15g^(2)-64f+4=0

Tangents from a Point Outside the circle.

The length of the tangent from a point on the circle x^(2)+y^(2)+4x6y-12=0 to the circle x^(2)+y^(2)+4x6y+4=0 is

Show that if the length of the tangent from a point P to the circle x^2 + y^2 = a^2 be four times the length of the tangent from it to the circle (x-a)^2 + y^2 = a^2 , then P lies on the circle 15x^2 + 15y^2 - 32ax + a^2=0 .

The length of a tangent from a point A at distance 5 cm from the centre of the circle is 4 cm. Find the radius of the circle.

The length of a tangent from a point A at distance 5 cm from the centre of the circle is 4 cm . Find the radius of the circle.

The length of a tangent from a point A at distance 5cm from the centre of the circle is 4cm. Find the radius of the circle.