A Secant is drawn from a point P to a circle so that it meets the circle first at A, then goes through the center and leaves the circle at B.  If the length of the tangent from P to the circle is 10 cm, and the radius of the circle is 6 cm, then the distance from P to A is?

2

OT ⊥ TP  (∠OTP = 90°)

triplets = 6, 8, 10

OP = 8 cm

PA = OP - OA = 8 - 6 = 2 cm