a) Ta có PR > RQ > QP. Suy ra $\widehat{Q}>\widehat{P}>\widehat{R}$
b) Ta có $\widehat{B}>\widehat{C}>\widehat{A}$. Suy ra b > c > a
a) Ta có PR > RQ > QP. Suy ra $\widehat{Q}>\widehat{P}>\widehat{R}$
b) Ta có $\widehat{B}>\widehat{C}>\widehat{A}$. Suy ra b > c > a