Answer with explanation:
Two Triangles are Congruent by following Geometrical Axioms
1. In Δ DEF and Δ P QR
∠DEF=∠PQR→→Each being 90°
Δ DEF ≅ Δ P QR→→[SAS Congruency]
2. As in Image 2, only one angle is common
we can't say that triangles are congruent.
3. In ΔT UV and Δ W X Y
ΔT UV ≅ΔW X Y→→[By SAS or AAS or SSS]
4.In ΔABC and ΔFGH
we can't say that triangles are congruent,as neither the other two angles nor the other two sides are equal.
5. None of the sides nor of the angles are equal .So the triangles are not congruent.
→→So, Image 1, Image 3, are congruent Polygons.