Răspuns:
Explicație pas cu pas:
Aabcd=ABxAD=120mx90m=10800m²
AM=2AB/3=2x120/3=80m
AP=2AD/3=2x90/3=60m
Ahas=Aabcd-Aamnp=10800-80x60=10800-4800=6000m²
AC²=AB²+BC²=14400+8100=22500 AC=150m
sin∡CAB=90/150=0,6
sin∡NAM=NM/AN=60/100=0,,6
AN si AC sunt in prelungire A, N si C sun coliniare