Question

in triangle ABC and DEF angle B =angle E, angle F = C and Ab = 3DE then the triangles are
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Answer 1

In △ABC and △DEF

∠B=∠E (given)

∠C=∠F (Given)

∠A=∠D (third angle) 

Thus, △ABC∼△DEF (AAA rule)

Given, AB=3DE Since, AB=notDE

The two triangles are similar but not congruent