are you searching for how much eva has or justin?
in an equilateral triangle, each angle is the same
so each angle equals 60
subtract 3 from each side
5y +3-3 = 60-3
5y = 57
divide by 5
5y/5 = 57/5
y = 11.4
length of other diagonal is 17 feet.
we have given,
length of rectangular window = 15 feet
width of rectangular window = 8 feet
diagonal length = 17 feet
we can also apply pythagoras theorem to check if it is a diagonal of rectangle or not
i.e 17² = 15² + 8²
or 289 = 225 + 64
or 289 = 289
hence given diagonal length is the diagonal length of rectangular window.
diagonals joining opposite vertex of rectangle are equal.
.since the length of one diagonal is 17 feet.
therefore length of other diagonal will be 17 feet as well.
the answer is a
the distance from the near end of the runway to the plane, divided by the altitude is the tangent of (90 degrees minus the angle of depression). let "d1" be the distance to the near end of the runway, and "d2" be the distance to the far end of the runway. let "a" be the altitude of the plane.
d1/a = tan(90 - 31)
d1 = a*tan(90 - 31)
d2/a = tan(90 - 23)
d2 = a*tan(90 - 23)
runway length = d2 - d1 = a*(tan(67) - tan(59))
length = 1800*(.6916) = 1245m = 1.2km
the answer is "a"