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If the circles have the same radius then an infinite number, and if they do not, then none.

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Q: How many common external tangent can be drawn to two concentric circles?
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Related questions

What is the meaning of concentric circles?

They are circles that have a common centre


What are Circles having same centre but different radii called?

Concentric circles are circles with the same common centre.


What is a concentric circle?

"Concentric" means to have a common center. Concentric circles are circles of different sizes that all have the same center -- like a bullseye target.


What is the term for circles with a common center?

concentric


Does concentric circles have the same center?

Yes - concentric is a Latin term meaning common centre.


What is a tangent intersecting the segment joining the centers of the two circles?

They are the common tangents to the circles.


If two circles have the same point then what are they called?

If you mean they both have the same centre - they're called 'concentric' circles.


Define common internal tangent of 2 circles?

it intersects the segment joining the centers of two circles


What are concentrate circles?

AnswerThat would be circles with different sizes, having the same center.AnswerConcentric circles have a common center and different radii.Bulls eye could be an example of concentric circles.ans; Concentric circles are nothing but 2or more circles having common center but having different radius.Source: www.icoachmath.com


When are two circles concentric?

When they have the same centre. As a consequence, the distance between the two circles, along any common radial ray, is a constant.


What are concertic circles?

Concentric circles - are circles that share a common centre. A typical example - is dripping water into a bowl - where you'll see the ripples form and spread out to the edge of the container.


What refers to two or more coplanar circles with a common center?

Difficult to tell since there is nothing following. My guess is concentric, but that does not require the circles to be coplanar.