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Ex 3 rezolvare completa. Dau coroana!

Ex 3 Rezolvare Completa Dau Coroana class=

Răspuns :

A=1/2×AB×BC×sin(<B)=1/2×6√2×14×√2/2=42 cm²
P=AB+BC+AC
AC²=AB²+BC²-2×AB×BC×cosB
AC²=(6√2)²+14²-2×6√2×14×√2/2=72+196-168=100
AC=√100=10
P=6√2+14+10=24+6√2=6(4+√2)cm