If two circles touch each other (internally or externally); the point of contact lies on the line through the centres.

If two circles touch each other externally then the point of contact will on the line- segment joining the two centers___prove it.

If two circles S=0 and s'=0 are touch each other externally then

Prove that, "If two circles touch each other externally, their centres and the point of contact are collinear".

"If two circles each other externally them the point of contact and the centres are collinear" Prove this.

Three circles touch each other externally. The tangents at their points of contact meet at a point whose distance from a point of contact is 4. Show that the ratio of the product of the radii of the sum of the radii of the circles is 16.

Three circles touch each other externally. The tangents at their point of contact meet at a point whose distance from a point of contact is 4. Then, the ratio of their product of radii to the sum of the radii is

Three circles touch each other externally. The tangents at their point of contact meet at a point whose distance from a point of contact is 4. Then, the ratio of their product of radii to the sum of the radii is

Three circles touch each other externally. The tangents at their point of contact meet at a point whose distance from a point of contact is 4. Then, the ratio of their product of radii to the sum of the radii is

Three circles touch each other externally. The tangents at their point of contact meet at a point whose distance from a point of contact is 4. Then, the ratio of their product of radii to the sum of the radii is