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When the centers of both the circles are at the same point.

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Q: When are two coplanar circles concentric?
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Related questions

What are coplanar circles with the same center?

They're concentric circles. But I don't think they even need to be coplanar in order to be concentric.


Are coplanar circles that have the same center called concentric circles?

Concentric Circle


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.


What is two or more circles with same center called?

Concentric circles.


Circles that lie in the same plane and have the same center?

They're definitely similar, concentric, and coplanar. They're not necessarily congruent, but they could be.


What word would you use to describe two circles of different radius but of the same center?

They are said to be concentric circles.


Two or more circles with the same center are?

Concentric circles


Do concentric circles have the same area?

Concentric circles have the same center. They are not necessarily the same size. If two concentric circles have the same area, then they are congruent, meaning they coincide when superimposed.


What are two coplanar circles that intersect at exactly one point?

Tangent circles.


What two coplanar circles have four common tangents?

Any two non-overlapping circles.


Is the center of a circle the point of intersection for two concentric circles?

Concentric circles are the circles with the same center therefore they do not cross with each other as the "center is not considered a point on the circle". An exception would be two circles that are concentric and have the same radius, in which case the circles are indistinct and every point of the circles is an intersection.


What are Two circles with the same centre point called?

Concentric circles