Mathematics Ms Sue help

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You want to estimate the height of the Empire State Building. You start at its base and walk 15 m away. Then you approximate the angle from the ground at that point to the top to be 88 degrees. How tall do you estimate the Empire State Building to be?

  • Ms Sue help -

    An anchor holding a boat stationary on a river forms a 65 degree angle with the river bottom. The anchor line is 40 meters long. Assuming the river has a uniform depth, how deep is the river directly below the boat?

  • Mathematics Ms Sue help -

    sorry for the repost. thanks for all your help you provide everybody on the daily

  • Mathematics Ms Sue help -

    If you look at your diagram, you should see a right-angled triangle, with base angle 88°, opposite = ? = height
    and adjacent = 15 m

    so height/15 = tan88
    height = 15tan88 = appr 429.5m

  • Mathematics Ms Sue help -

    for the building,
    h/18 = tan 88°

    for the boat,

    d/40 = sin 65°

    for stuff like this, it always helps to draw a diagram, then dig into your box of trig ratios

  • Mathematics Ms Sue help -

    For you second question...

    this time you know the hypotenuse and the opposite side, so you know you must dealing with the sine ration
    sin 65 = height/40
    height = 40sin65 = appr 36.25 m

  • Mathematics Ms Sue help -

    thanks for all you guys helps. drawing shows a better concept then straight digging it thanks

  • Mathematics Ms Sue help -

    400 m

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