Question 1202761
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{{{
drawing(400,400,-5,5,-5,5,
line(-3,-3,3,3),
line(3,3,3,-3),
line(3,-3,-3,-3),
locate(-3+0.5,-3+0.65,50^o),
locate(0-1,0+0.5,matrix(1,2,"12","km")),
locate(3+0.2,0,"h"),

locate(-4.9,-4,matrix(1,2,"diagram","not")),
locate(-4.9,-4.5,matrix(1,2,"to","scale"))
)
}}}

sin(angle) = opposite/hypotenuse
sin(50) = h/12
h = 12*sin(50)
h = 9.19253331742773
h = 9.2


The height of the airplane is <font color=red>approximately 9.2 km</font>.
Round that however needed.



Extra info:
9.2 km = 5.7166 miles = 30183.727 feet approximately 
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