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A triangular pyramid has a base shaped like an equilateral triangle. The legs of the equilateral triangle are all 5 inches long, and the height of the equilateral triangle is 4.3 inches. The pyramid's slant height is 5 inches. What is its surface area?
please help me solve

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anna

  1. Impatient much?
    Your posts (first one now removed) are only 6 minutes apart, remember all tutors here are volunteers and
    most of us are on only occasionally during a day.

    anyway....
    It sound like your pyramid is a tetrahedron, that is, it is made from 4 equilateral triangles
    So the surface area would simply be 4 times the area of an equilateral triangle with sides 5
    Area of one of them = (1/2)(5)(4.3)
    = ...

    Now multiply that by 4

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    Reiny

  2. A rectangular pyramid has a base that is 4 inches long and 4 inches wide. The pyramid's slant height is 4 inches. What is its surface area?

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    Roselya

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