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Tangents are drawn to a circle at the two end-points of a diameter. These two tangents are:
Answer & Solution
Correct answer: C.
1. Each tangent at a circle is perpendicular to the diameter through its point of contact.
2. At both ends of a single diameter, the perpendicular line is uniquely determined.
3. Both tangents are perpendicular to the same diameter line.
4. Two lines both perpendicular to a third line are parallel to each other.
5. Hence the tangents at the ends of a diameter are parallel.
_Source: SCERT Kerala Std X Mathematics Part-2, Chapter 7 "Tangents" (pp 159-172, 2019 ed.)._
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