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?
2 answers
find the altitude of an equilateral triangle each of whose sides is 100 cm. long.
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.
2 answers