Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

nohegarcia Group Title

Find the area of the trapezoidal cross-section of the irrigation canal shown below. Your answer will be in terms of h, w, and θ. http://www.webassign.net/hgmcalc5/1-5-049.jpg

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. NoelGreco Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1346472458903:dw| Can you calculate p from some trig function of theta ("th" is theta in drawing)

    • 2 years ago
  2. nohegarcia Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    1/2*p*h=area?

    • 2 years ago
  3. NoelGreco Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Yeah, but we really need to use p temporarily. First of all do you see how I got the theta near the p?

    • 2 years ago
  4. nohegarcia Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    its a complmentary angle? sorry im totally lost

    • 2 years ago
  5. NoelGreco Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    No, actually, it's congruent to the theta given in the problem because alternate interior angles of transversals and parallel lines are congruent. Does that ring any bells?

    • 2 years ago
  6. nohegarcia Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    kindof but i dont know why you would do that

    • 2 years ago
  7. NoelGreco Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Well, if I knew an expression for p, I could say that the long base of the trapezoid was w + 2p, the other base is w, and we have h. That's all you need for the area of a trapezoid.

    • 2 years ago
  8. NoelGreco Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Isn't \[\tan \theta = \frac{ h }{ p}\]

    • 2 years ago
  9. nohegarcia Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah so what would the area be?

    • 2 years ago
  10. nohegarcia Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    tan(theta)*p/h

    • 2 years ago
  11. nohegarcia Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    @NoelGreco

    • 2 years ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.