91影视

If two angles of a triangle are congruent, then the sides opposite to those angles are congruent.

From the given figure it can be observed that$\stackrel{炉}{TR}$ is opposite to$鈭�S$ and$\stackrel{炉}{RS}$ is opposite to$鈭�T$.

As $鈭�S鈮�鈭�T$, $\stackrel{炉}{TR}鈮�\stackrel{炉}{RS}$.

If two parallel lines are intersected by a transversal then the angles made by transversal with respect to lines are congruent and are called alternate angles.

As,$\stackrel{炉}{ST}\left|\right|\stackrel{炉}{QP}$ and$鈭�T鈮�鈭�P;鈭�Q鈮�鈭�S$.

If$鈭�A鈮�鈭�B$ and$鈭�B鈮�鈭�C$ then $鈭�A鈮�鈭�C$.

Since, $鈭�P鈮�鈭�T$, $鈭�T鈮�鈭�S$and $鈭�S鈮�鈭�Q$implies that $鈭�P鈮�鈭�Q$.

If two angles of a triangle are congruent, then the sides opposite to those angles are congruent.

From the given figure it can be observed that $\stackrel{炉}{QR}$is opposite to $鈭�P$and $\stackrel{炉}{PR}$is opposite to $鈭�Q$.

As $鈭�P鈮�鈭�Q$, $\stackrel{炉}{PR}鈮�\stackrel{炉}{QR}$.

Write a two-column proof based on above explanation.

Therefore, only (1) and (2) statements are true.