Secant of a circle

Let PAB be a secant to a circle intersecting at points A and B, and PC is a tangent. Which one of the following is correct?

Let PAB be a secant to a circle intersecting the circle at A and B. Let PT be the tangent segment. If PA = 9 cm and PT =12 cm, then what is AB equal to?

PAB and PCD are two secants to a circle. If PA = 10 cm, AB = 12 cm and PC = 11 cm, then what is the value (in cm) of PD?

Length Of Tangent And Secant Of Circle

Draw a circle and two lines parallel to a given line such that one is a tangent and the other,a secant to the circle.

If PAB are secant to the circle and PT is tangent segment; then PA xx PB=PT^(2)

As shown in the figure,PA is a tangent to a circle and PBC is a secant,so that PB=AB . Prove that PB.PC=AC^(2)

In the given figure O is the center of circle and its radius is 10 cm. If BC is tangent and CA is a secant. If AC = 36 cm., then area of DeltaABC ?

Theorem of external division of chords. If secants containing chords AB and CD of a circle intersect outside the circle in point E, then AE xx EB = CE xx ED Given : (1) A circle with centre O (2) Secants AB and CD intersect at point E outside the circle. To prove : AE xx EB = CE xx DE Construction : Draw seg AD and seg BC