Multiple choice

Two circles touch internally. Then the number of common tangent lines are -

  1. 4

  2. 2

  3. 3

  4. 1
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When two circles touch internally (one circle lies inside the other and they touch at exactly one point), there is exactly 1 common tangent line - the tangent at their point of contact.

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