How Many Intersection Points Can Two Circles Have?

Thread starter hkus10
Start date Jan 21, 2011
Tags

Linear Linear equations Matrices

Jan 21, 2011

hkus10

Let C1 and C2 be circles in the plane. Describe the number of possible points of intersection of C1 and C2.

It is 4?

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Jan 21, 2011

CompuChip

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I don't think I can draw two circles with 4 points of intersection... can you?

Also there are multiple possbilities, there might be 0 for example (just draw one in London and one in Tokyo)

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