Answer :

**(a)** In the above-given question, we have given that:

AB = DE

Also, BC = EF

And, AC = DF

Therefore, both the triangles are equal by SSS congruence criterion

As the sides of both the triangles are equal.

**(b)** In the above-given question, we have given that:

ZX = RP

Also,

RQ = ZY

And,

∠PQR = ∠XYZ

Therefore, both the triangles are equal by SAS congruence criterion

As

Two sides of both the triangles are equal. Also, ∠PQR and ∠XYZ are equal.

**(c)** In the above-given question, we have given that:

∠MLN = ∠FGH

Also,

∠NML = ∠GFH

And,

ML = FG

Therefore, both the triangles are equal by SAS congruence criterion

As two angles and the side included between these angles of ∠LMN are equal to two angles and the side included between these angles of ∠GFH.

**(d) **In the above-given question, we have given that:

EB = DB

Also,

AE = BC

And,

∠A = ∠C = 90^{o}

Therefore, both the triangles are equal by RHS congruence criterion

As, two right triangles, one side, and hypotenuse of the above-given triangles are equal

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