Asked by jenina
from a point 35 meter from a building and 2 meter above the ground, the angle of the elevation of the top of the building is observed to be 60 degrees. what is the height of the building?
Answers
Answered by
jenina
find the altitude of an equilateral triangle each of whose sides is 100 cm. long.
Answered by
Steve
as always, draw a diagram. If the building's height is h, then you can see that
(h-2)/35 = tan 60°
If you draw an equilateral triangle, and drop an altitude to one side, you have a 30-60-90 triangle, whose sides are in the ratio 1:√3:2.
You know that the hypotenuse is 100, so now you can find the altitude.
(h-2)/35 = tan 60°
If you draw an equilateral triangle, and drop an altitude to one side, you have a 30-60-90 triangle, whose sides are in the ratio 1:√3:2.
You know that the hypotenuse is 100, so now you can find the altitude.
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