A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Which formula represents the subtracted portion of the surface area formula for the shape below? Assume that all rectangular faces are squares. Three figures join to make a composite solid. On the left, a square based pyramid is attached to the top of a cube. The right side of the cube is attached to the side of a triangular prism. four s squared one-third s squared h one-third s squared h plus one-half s square h s h fan i wil try to draw

  • This Question is Open
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1438540221597:dw| sorry this is not very good

  2. phi
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    I'm not sure what you (they) mean by " the subtracted portion of the surface area formula " I would *guess* it means the "hidden" sides of the square covered by the pyramid and prism" but that would be \( 2s^2\). But that does not match any of the choices.

  3. mathstudent55
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1438546775095:dw|

  4. mathstudent55
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1438546923233:dw|

  5. mathstudent55
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1438547009110:dw|

  6. mathstudent55
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    @phi If you were to find the total surface area of the composite solid, you could find the total surface area of each component, the cube, the pyramid, and the prism. Then you'd have to subtract the area of 4 square faces. It is \(4s^2\) because there are two faces of the cube hidden (top and right), one face of the pyramid hidden (bottom base), and one face of the prism hidden (left square). Altogether there are 4 hidden square faces.

  7. phi
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    ok, that makes sense. we subtract double the "hidden faces"

  8. mathstudent55
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Exactly.

  9. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

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.