In the diagram, triangle ADC ADC\,ADC is right-angled at D D\,D and triangle ABC ABC\,ABC is right-angled at AAA. AD=6AD = 6AD=6 cm, DC=5DC = 5DC=5 cm and BC=11BC = 11BC=11 cm. AC AC\,AC is a common side to both triangles.
Calculate the length of ABABAB.
Give your answer to 3 significant figures.
