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Which statement best describes a tangent as a special case of a secant?
AA tangent is a secant passing through the centre of the circle.
BA tangent is obtained when the two intersection points of a secant with the circle coincide.
CA tangent is any line parallel to a chord.
DA tangent is a chord of maximum length.
Answer & Solution
Correct answer: B. A tangent is obtained when the two intersection points of a secant with the circle coincide.
As a secant moves so that the chord it cuts becomes shorter and shorter, the two intersection points come closer together. In the limiting case, they coincide at one point, and the secant becomes a tangent. That is why a tangent is treated as a special case of a secant.
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