- A1
- B2
- C3
- D4
Step-by-Step Solution
Two externally touching circles have 3 common tangents: 2 direct ones and 1 at the point of contact.
Answer: C) 3
Arjun observes two coins lying flat on a table so that their edges just touch each other at one point (externally touching circles).
He wants to lay straight rulers so that each ruler touches both coins without cutting across either coin.
How many such straight ruler positions (common tangents) are possible?
Class 10Number of Tangents from a PointGeometry
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