If △ABC and △XYZ are right-angled triangles, right angled at B and Y respectively, then for what value of x will △ABC be congruent to △XYZ ?
In △ ABC and △ XYZ, if AB = XY, BC = YZ and ∠ ABC = ∠XYZ = 90∘, then by which postulate is △ABC ≅△XYZ ?
If △ABC∼△PQR and ∠B=∠R=60∘, then find ∠ RPQ.