Răspuns:
Aria teren=120•90=10800 m^2
Aria celor două peluze = Aria cerc =pi•90^2=3,1415•8100=25446,15 m^2 Da, este mai mare.
AM^2 = 90^2 + 60^2
AM^2 = 8100+3600
AM^2 = 11700
AM=30rad13 m
sinMAB = MB/AM = 60/30rad13 = 2rad13/13
sinDAC = DC/AC
AC^2 = 120^2 + 90^2
AC^2 = 14400+8100
AC^2 = 22500
AC=150 m
sinDAC=90/150=3/5
sinDAC+sinCAM+sinMAB=sin 90°=1
3/5 + sinCAM+2rad13/13 = 1
sinCAM = 1 - 3/5 - 2rad13/13
sinCAM = (65-39-10rad13)/65
sinCAM = (26-2rad13)/65
