Question

In the figure below, the chords CD and AB intersect externally at T. DT = 4 cm, BT = 3 cm and CD = 5 cm. calculate the length AB. 

Answer 1

AT.BT = CT.DT
(AB + 3).3 = 9 x 4
AB + 3 = ³⁶/₃
AB = 12 - 3
9cm