Answer :

swandqs
The answer should be this ∠ACB ≅ ∠DCB. I hope this helps

The included angle of one triangle are equal to  included angle of another triangle

The SAS postulate state that, If two sides and the included angle of one triangle are equal to two sides and included angle of another triangle, then the triangles are congruent.

Therefore, include angles B must be equal for both triangles.

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