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# In bigtriangleup ABC,angle A= 30^o, angle B= 40^o and angle C= 110^o. In bigtriangleup PQR, angle P=30^{o}, angle Q=40^{o} and angle R=110^o.

4. In $\bigtriangleup ABC$,$\angle A= 30^{o}$ , $\angle B= 40^{o}$ and $\angle C= 110^{o}$.

In $\bigtriangleup PQR$, $\angle P=30^{o}$ , $\angle Q=40^{o}$ and $\angle R=110^{o}$. A student says that $\bigtriangleup ABC\cong \bigtriangleup PQR$ by AAA congruence criterion. Is he justified? Why or why not?