l and m are two parallel lines intersected by another pair of parallel lines p and q(see Fig. 7.19). Show that Δ ABC Δ CDA.


It is given in the figure given, 


 


l parallel to m


And, p parallel to q


To prove:- ΔABC ≅ ΔCDA  


BCA = DAC (Alternate interior angles)


∠BAC = ∠DCA (Alternate interior angles)


And, side AC is common 


Therefore, By ASA congruence,


ΔABC ≅ ΔCDA

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