GEOMETRY (SA oftriangular pyramid)

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Find the surface area of a triangular pyramid with b =4 cm, h= 8.2 cm and s = 7 cm. PLEASE. How ?

  • GEOMETRY (SA oftriangular pyramid) -

    Lateral surface area
    =perimeter of base * apothem /2
    =3b*s/2
    (for a regular pyramid with a triangular base)

    Area of triangular base with side b
    =(√3)*b/2*(b/2)
    =(√3)b²/4

  • GEOMETRY (SA oftriangular pyramid) -

    What is apothem ?

  • GEOMETRY (SA oftriangular pyramid) -

    why did you not include the height ?

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