Question

Define tangent, secant, and chord????? ​

Answer 1

The tangent-secant theorem describes the relation of line segments created by a secant and a tangent line with the associated circle. This result is found as Proposition 36 in Book 3 of Euclid's Elements.

We call a line a secant if it intersects twice, and a tangent if it intersects once (just touching at a single point). ... Chords are segments connecting two points on a circle, so chords become secants when extended.

Answer 2

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Tangent : Tangent is mainly a mathematical term, meaning a line or plane that intersects a curved surface at exactly one point. The non-mathematical meaning of tangent comes from this sense of barely touching something: when a conversation heads off on a tangent, it's hard to see how or why it came up.

Secant : A straight line or ray that intersects a curve, especially a circle, at two or more points. The ratio of the length of the hypotenuse in a right triangle to the side adjacent to an acute angle. The secant is the inverse of the cosine.

Chord : A chord of a circle is a straight line segment whose endpoints both lie on the circle. The infinite line extension of a chord is a secant line, or just secant. More generally, a chord is a line segment joining two points on any curve, for instance, an ellipse. ... The word chord is from the Latin chorda meaning bowstring.

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