Fill in the blank: ΔABC∼ ______.
In Fig. 7.142, if AB⊥BC,DE⊥BC and DE⊥AC, prove that ΔCED∼ΔABC.
In the given figure, ∠B=∠E,∠ACD=∠BCE,AB=10.4 cm and DE = 7.8 cm. Find the ratio of areas of the ΔABC and ΔDEC.