Respuesta :

From the figure in the question;

[tex]\angle A\text{ }\cong\angle C[/tex]

Since these angles are equal

then

If two angles of a triangle are congruent then the sides opposite the angles are congruent

Hence

[tex]\vec{AB}\text{ = }\bar{\text{CB}}[/tex]

Thus,

If two angles of a triangle are congruent then the sides opposite the angles are congruent is sufficient to prove that AB = CB

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