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 tangent and the other, a secant to the circle.

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

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

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