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Math Help - Plz help confused

  1. #1
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    Question Plz help confused

    My some one plz help I confused in this problem I thnk I did it wrong.
    If so where did I go wrong.

    A triangular prism has a height of 12 m. What is the surface area of the prism if its bases are right triangles w/ legs 3 meters and 4 meters?

    My answer is:

    C^2 = 3^2 + 4^2
    C^2 = 9 + 16
    C^2 = 25
    C= 5

    P= 4 + 3 + C
    P= 4 + 3 + 5
    P= 12

    B = 1/2 bh
    B = 1/2 (4)(3)
    B= 1/2 (12)
    B = 6

    L = Ph
    L= 12 (12)
    L= 144

    S= L + 2B
    S= 144 + 2 (6)
    S= 144 + 12
    S= 156 m

    Thank you for the help.
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by JayJay1206 View Post
    My some one plz help I confused in this problem I thnk I did it wrong.
    If so where did I go wrong.

    A triangular prism has a height of 12 m. What is the surface area of the prism if its bases are right triangles w/ legs 3 meters and 4 meters?

    My answer is:

    C^2 = 3^2 + 4^2
    C^2 = 9 + 16
    C^2 = 25
    C= 5

    P= 4 + 3 + C
    P= 4 + 3 + 5
    P= 12

    B = 1/2 bh
    B = 1/2 (4)(3)
    B= 1/2 (12)
    B = 6

    L = Ph
    L= 12 (12)
    L= 144

    S= L + 2B
    S= 144 + 2 (6)
    S= 144 + 12
    S= 156 m

    Thank you for the help.
    You are correct!!
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  3. #3
    is up to his old tricks again! Jhevon's Avatar
    Joined
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    New York, USA
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    Here's a nice site that deals with the surface area of rectangular, circular and triangle prisms

    Surface Area of Prisms
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