Sol:
We know that when a quadrilateral circumscribes a circle then sum of opposites sides is equal to the sum of other opposite sides.
\ AB + CD = AD + BC
Þ 6 + 8 = AD = 9
Þ AD = 5 cm
We know that when a quadrilateral circumscribes a circle then sum of opposites sides is equal to the sum of other opposite sides.
\ AB + CD = AD + BC
Þ 6 + 8 = AD = 9
Þ AD = 5 cm