Prove that two different circles cannot intersect each other at more than two points.

Suppose 2 distinct circles intersect at more than 2 points.

∴These points are non-collinear points.

As 3 non-collinear points determine one and only one circle, 

∴There should be only one circle.

This contradicts our assumption. Therefore, our assumption is wrong.

Hence, 2 circles can't intersect each other at more than 2 points.

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Hi!
Two different circles intersect each other in the following three ways.

 

Here, it is seen that the two circles can not intersect each other at more than two points.
 
Cheers!
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