1.

In the adjacent figure, CD and BE are altitudes of an isosceles triangle ABC with AC = AB prove that AE = AD.

Answer»

In ∆ADC and ∆AEB 

AC = AB [data] 

∠ADC = ∠AEB[BE & CD altitudes] 

∠DAC =∠EAB [Common angle] 

∆ ADC = ∆ AEB[AS∆postulate] 

AD=AE [Corresponding sides]



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