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Dallasb22 Group Title

I need some help with Geometry, Finding Total Area in Prisms.

  • 2 years ago
  • 2 years ago

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  1. johnsonshelby Group Title
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    Si, si

    • 2 years ago
  2. johnsonshelby Group Title
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    What is the question?

    • 2 years ago
  3. Dallasb22 Group Title
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    Find the Total Area of the Prism:

    • 2 years ago
  4. Dallasb22 Group Title
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    • 2 years ago
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  5. Dallasb22 Group Title
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    @johnsonshelby

    • 2 years ago
  6. johnsonshelby Group Title
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    Find the area of each side and add together... that's surface area I'm having a brain fart haha What is it you want to find?

    • 2 years ago
  7. Dallasb22 Group Title
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    Thats gross.

    • 2 years ago
  8. Dallasb22 Group Title
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    I want to find total Area

    • 2 years ago
  9. Dallasb22 Group Title
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    T.A. = ph + 2B

    • 2 years ago
  10. johnsonshelby Group Title
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    Rho as in density, right?

    • 2 years ago
  11. Dallasb22 Group Title
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    Rho?

    • 2 years ago
  12. johnsonshelby Group Title
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    Greek letter p

    • 2 years ago
  13. Dallasb22 Group Title
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    perimeter of the base times height of the prism + 2Base = Total Area

    • 2 years ago
  14. johnsonshelby Group Title
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    Well the 2B part is easy. 2(area of the triangles)

    • 2 years ago
  15. Dallasb22 Group Title
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    Area of Triangle : 1/2 times 9 "correct" ?

    • 2 years ago
  16. johnsonshelby Group Title
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    1/2 time base of the triangle times the height of the triangle. Because you are only given the base, you need to find the height.

    • 2 years ago
  17. Dallasb22 Group Title
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    And to find the height we use pythag theorem correct?

    • 2 years ago
  18. johnsonshelby Group Title
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    So your new base would be 1.5 and the hypo would still be 3, yep

    • 2 years ago
  19. Dallasb22 Group Title
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    So the height would be a^2?

    • 2 years ago
  20. johnsonshelby Group Title
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    c= 3, b=1.5, and yep a= a

    • 2 years ago
  21. johnsonshelby Group Title
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    so when you plug into pythag, you would get that

    • 2 years ago
  22. Dallasb22 Group Title
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    So A= √6.75 ?

    • 2 years ago
  23. johnsonshelby Group Title
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    Yeah!

    • 2 years ago
  24. johnsonshelby Group Title
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    I have to get to my orgo class in 10 minutes, can you take it from here?

    • 2 years ago
  25. Dallasb22 Group Title
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    So i find the area of the triangle and multiply it by 2 Then i add ?

    • 2 years ago
  26. johnsonshelby Group Title
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    add that to the (perimeter of the base x height), which would be (3+3+3)(6)

    • 2 years ago
  27. Dallasb22 Group Title
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    Area of Triangle = 1.5√6.75 correct?

    • 2 years ago
  28. phi Group Title
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    btw, people would write \[\sqrt{6.75} \] as \[ \frac{3 \sqrt{3}}{2}\]

    • 2 years ago
  29. Dallasb22 Group Title
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    Okay i got it. Thanks so much!! I just needed a refresh it's been awhile :)

    • 2 years ago
  30. Dallasb22 Group Title
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    So it would be 4.5√3 / 2 @phi ?

    • 2 years ago
  31. phi Group Title
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    generally you don't mix decimals and fractions i.e. 4.5/2 If you have a multiple choice you probably would see the answer as a pure fraction \[ \frac{4}{9}\sqrt{3} \]

    • 2 years ago
  32. phi Group Title
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    double that for the other triangle now you have 3 faces that all look the same size 3x6 3 faces each 18 = 54 plus the two triangles 8/9 sqrt(3)

    • 2 years ago
  33. Dallasb22 Group Title
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    Other triangle?

    • 2 years ago
  34. phi Group Title
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    you have two triangles (the ends) and 3 "side faces" right?

    • 2 years ago
  35. Dallasb22 Group Title
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    Yeah my bad, sorry

    • 2 years ago
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