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Which definition correctly describes a tangent to a circle?
Answer & Solution
Correct answer: A.
1. A secant cuts the circle at two points.
2. A tangent is the limiting case of a secant where the two intersection points coincide.
3. So a tangent touches the circle at exactly one point, called the point of contact.
4. A line entirely inside the circle is a chord segment, not a tangent.
5. A line from the centre to a point on the circle is a radius.
_Source: SCERT Kerala Std X Mathematics Part-2, Chapter 7 "Tangents" (pp 159-172, 2019 ed.)._
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