a) Xét \(\Delta NMP\) và \(\Delta QPM\) có:
\(NM=QP\)
\(NP=QM\)
\(PM\) chung
Khi đó: \(\Delta NMP=\Delta QPM\left(c.c.c\right)\)
b) Ta có: \(\Delta NMP=\Delta QPM\)
\(\Rightarrow\widehat{NPM}=\widehat{QMP}\) (2 góc tương ứng)
mà \(\widehat{NPM}=30^o\) nên \(\widehat{QMP}=30^o\)
#\(Toru\)