38. Exemplar exercise problems III

1. In $\triangle PQR$, $\angle R = \angle P$ and $QR = 4 \ cm$ and $PR = 5 \ cm$. Then the length of $PQ$ is

 

2. It is given that $\triangle ABC \cong \triangle FDE$ and $AB = 5 \ cm$, $\angle B = 40^{\circ}$ and $\angle A = 80^{\circ}$. Then which of the following is true?