If Fig. 15.26, ABCD is a parallelogram, AE ⊥ DC and CF ⊥ AD. If AB=16 cm, AE=8 cm and CF=10 cm, find AD.
Given that,
In a parallelogram ABCD:
CD = AB = 16cm (Opposite sides of parallelogram are equal)
We know that,
Area of parallelogram = Base * Corresponding altitude
Area of parallelogram ABCD:
CD * AE = AD * CF
16 cm * 18 cm = AD * 10 cm
AD = 
AD = 12.8 cm
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