Number of common tangents for a given position of circles

1. A.
   2
2. B.
   4
3. C.
   3
4. D.
   1

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1. A.
   0
2. B.
   1
3. C.
   2
4. D.
   3

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1. A.
   The internal tangent is longer than the external tangent
2. B.
   Only two common tangents exist
3. C.
   The number of tangents depends on radii
4. D.
   They must be concentric

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1. A.
   17
2. B.
   16
3. C.
   9
4. D.
   12

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1. A.
   4 tangents: 2 direct and 2 transverse
2. B.
   3 tangents: 2 direct and 1 transverse
3. C.
   2 tangents: only direct tangents
4. D.
   0 tangents: the larger circle completely contains the smaller one

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1. A.
   8 cm
2. B.
   2 cm
3. C.
   5 cm
4. D.
   10 cm

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