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If for two given circles exactly two common tangents are possible, the circles

Sagot :

4 common tangents = circles do not touch
3 common tangents = circles touch at one point
2 common tangents = circles overlap
1 common tangent = circles touch at one point and one is inside the other
0 common tangents = circles do not touch and one is inside the other

Refer to the image if you need to
View image RedRicin