Quadrilateral ABCD circumscribes circle. If AB = 8 cm, BC = 7 cm and CD = 6 cm, then the length of AD is:

6 cm 7.5 cm 7 cm 6.8 cm

7 cm

AB = 8 cm, BC = 7 cm and CD = 6 cm. We know, AD + BC = CD + AB = AD + 7 = 6 + 8 = AD = 14 – 7 = AD = 7 cm