two chords ab and cd intersect at p outside the circle. if ab=6 cm, bp=2 cm and pd= 2.5 cm, find cd

two chords ab and cd intersect at p outside the circle. if ab=6 cm, bp

1.	two chords ab and cd intersect at p outside the circle. if ab=6 cm, bp=2 cm and pd= 2.5 cm, find cd
Answer» CD=3.9 cm