According to the definition of similarity of triangles, which are the conditions for correspondence DEF ↔ ZXY between ΔDEF and ΔXYZ to be a similarity?

Given, ∆DEF ∆ZXY,

There are mainly two conditions for correspondence DEF ZXY between DEF and XYZ to be a similarity.

The corresponding angles are congruent.

i.e. mD = mX D X

mE = mY E Y

mF = mZ F Z

The lengths of the corresponding sides are in proportion.

i.e.

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