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sharrymath Group Title

The base of an isosceles triangle is 20 cm. and the altitude is increasing at a rate of 1 cm./min. At what rate is the base angle increasing when the area of the triangle is 100 cm^2?

  • 3 years ago
  • 3 years ago

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  1. JS Group Title
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    im confused as to what your asking...can you clarify so I can help you out?

    • 3 years ago
  2. a933793 Group Title
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    http://adf.ly/1EjFf ^ Diagram. If we were to look at the middle line, h. We can set up a trigonometric function to describe the relation of the increasing altitude and the angle, correct?

    • 3 years ago
  3. a933793 Group Title
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    We can say: tan(x)=h/(a/2)=2h/a but! we know that two of those values are changing with respect to time dh/dt=1cm/min So we can get: tan(dx/dt)=(2dh/dt)/a Also note that we an figure out the a/2 or a term by recalling the area of a triangle.

    • 3 years ago
  4. sharrymath Group Title
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    I am unable to see your diagram.

    • 3 years ago
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